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Jameson Lopp

21 min read

Jameson Lopp is the American software engineer, Bitcoin security and privacy expert, and co-founder/CTO of Casa (collaborative custody), widely regarded as the most practical and authoritative voice on Bitcoin self-custody and personal security. A cypherpunk in disposition who became known after being swatted in 2017 — an experience that led him to adopt an extreme privacy lifestyle and to publish the canonical essay "I Am Become Doxxed" — Lopp has built his career around the operational questions the more theoretical Bitcoin thinkers don't address: how to actually hold Bitcoin securely, manage multisig, design inheritance plans, maintain privacy, and prepare for the specific attacks (physical coercion, supply-chain compromise, social engineering) that significant holdings invite. He maintains bitcoinresources.com (formerly lopp.net) and statoshi.info. Where Wuille is the protocol engineer, Maxwell the cypherpunk-cryptographer, and Antonopoulos the technical educator, Lopp is the operational security expert who translates Bitcoin's theoretical sovereignty promises into practical reality.

Why Lopp matters

Lopp’s fingerprints are on the operational self-custody and security dimensions:

  • Casa multisig framework — the leading collaborative-custody framework for Bitcoin; underlies Multisig setups and the broader self-custody framework.
  • Bitcoin Resources aggregation — the most comprehensive single aggregation of Bitcoin reference material.
  • Self-custody advocacy and practical guidance — the most authoritative voice on actually doing Bitcoin self-custody; underlies seed-phrase, backup-strategy, and opsec material.
  • Privacy and threat-model analysis — framework for thinking about personal threats and operational privacy.
  • The “I Am Become Doxxed” experience — lived experience of personal attacks shapes the operational guidance in ways purely theoretical frameworks cannot.
  • Inheritance planning — sophisticated frameworks for Bitcoin inheritance intersecting with the broader estate-planning domain.

Where other Bitcoin thinkers provide the case for Bitcoin and its theoretical foundations, Lopp provides the practical operational framework for actually doing self-custody in a world of real threats.

Biographical sketch

Origins and pre-Bitcoin career

Jameson Lopp was born in the United States in the 1980s. His specific birthplace and family background are not publicly documented — Lopp maintains substantial personal privacy, particularly post-2017.

He pursued an education in computer science and entered software engineering as a career. His pre-Bitcoin work was in software development for various companies, building technical credentials that would later inform his Bitcoin work.

Bitcoin involvement and BitGo

Lopp discovered Bitcoin around 2012 and became increasingly engaged with technical and operational questions. By 2015, he had joined BitGo as a senior software engineer working on Bitcoin custody and security infrastructure.

BitGo was one of the first major Bitcoin custody services for institutional clients. The work involved:

  • Multi-signature custody for institutional Bitcoin holders
  • Security infrastructure for handling significant Bitcoin amounts
  • Threat modeling and operational security frameworks
  • Compliance and regulatory engagement

The BitGo experience gave Lopp practical knowledge of institutional Bitcoin custody that few other public Bitcoin figures shared. The lessons learned would inform his subsequent Casa work.

The 2017 doxxing/swatting and lifestyle change

In October 2017, Lopp was swatted — attackers placed a false emergency call to his home reporting a hostage situation, resulting in armed police response. The attack was apparently linked to his Bitcoin profile and was deliberately targeted.

Lopp documented the experience in his now-canonical essay “I Am Become Doxxed” (2017). The essay:

  • Described the swatting incident in detail
  • Analyzed the broader threat landscape facing public Bitcoin figures
  • Outlined his subsequent privacy-protection lifestyle changes
  • Set new standards for personal operational security in Bitcoin community

The lifestyle changes were extreme. Lopp:

  • Moved to an undisclosed location with substantial physical security
  • Established multiple layers of address privacy (PO boxes, anonymous LLCs, etc.)
  • Implemented sophisticated personal threat modeling
  • Restructured his entire financial-administrative life for privacy
  • Maintained substantial public presence while protecting personal-life details

The combination is distinctive. Most figures who experience similar attacks either go fully private (becoming pseudonymous) or fully public (accepting the risks). Lopp’s hybrid approach — substantial public Bitcoin engagement combined with extreme personal privacy — has become a model for many subsequent Bitcoin public figures.

The “I Am Become Doxxed” essay has been widely shared and remains essential reading for anyone in the Bitcoin community concerned about personal security. It is a primary source for understanding the specific threats facing Bitcoin advocates and the practical responses available.

Casa and the multisig framework

In 2017-2018, Lopp co-founded Casa with Jeremy Welch and Nick Neuman. Casa positioned itself as a collaborative custody service — providing infrastructure for Bitcoin holders to maintain self-custody while having professional support for key management.

The Casa framework:

  • Multisig setups (typically 2-of-3, 3-of-5) — multiple keys required to spend
  • Distributed key custody — keys held in multiple secure locations
  • Professional infrastructure — Casa provides emergency support, recovery assistance, hardware
  • User-controlled keys — Casa holds at most a minority of keys; user remains in control
  • Inheritance planning — frameworks for transferring Bitcoin to heirs

The framework differs from both pure self-custody (technical expertise required for everything) and pure custodial services (Bitcoin held by third party):

  • Sovereignty preserved — user holds majority of keys
  • Operational support — professional help for complex situations
  • Risk distributed — no single point of failure
  • Recovery possible — designed for various failure scenarios

Casa has become one of the leading Bitcoin custody frameworks. For institutional and high-net-worth Bitcoin holders particularly, the Casa-style collaborative-custody model has been broadly influential.

Casa’s framework is foundational for Multisig setups and Collaborative custody services.

Current activity

As of 2026, Lopp’s activity includes:

  • Casa CTO and product leadership — ongoing leadership of the custody service
  • Bitcoin Resources — maintaining bitcoinresources.com aggregator
  • Statoshi — maintaining statoshi.info network statistics
  • Conference speaking — frequent at Bitcoin and security events
  • Writing — essays at lopp.net and other venues
  • Twitter/X presence (@lopp) — very active; substantive security and Bitcoin engagement
  • Educational content — guides, frameworks, threat models

Lopp lives at undisclosed locations in the United States (multiple locations and substantial mobility for privacy). He maintains the most distinctive privacy lifestyle among Bitcoin public figures.

He is unusual among Bitcoin contributors for:

  • Combining technical credibility with public accessibility on security topics
  • Living the extreme-privacy lifestyle he advocates
  • Sustained focus on operational self-custody rather than monetary theory or development
  • Commercial commitment through Casa without obvious corruption
  • Cypherpunk credibility through both Bitcoin involvement and lived privacy practice

Major works

”I Am Become Doxxed” essay (2017)

Lopp’s canonical essay on the swatting incident and his subsequent privacy lifestyle. The essay:

  • Describes the October 2017 swatting attack in detail
  • Analyzes the threat landscape facing public Bitcoin figures
  • Documents his immediate post-attack security responses
  • Outlines the broader lifestyle restructuring he undertook
  • Provides framework for other public figures facing similar threats

The essay has been widely shared and remains essential reading. It is primary source for understanding:

  • Specific threats Bitcoin public figures face
  • Practical responses available to those facing similar threats
  • The cypherpunk practice of personal sovereignty applied operationally
  • The costs of public Bitcoin advocacy

This essay is foundational for the security and threat-model framework. Citations to Bitcoin community threats or operational security frameworks often trace to this essay.

See: Common attack vectors.

Casa custody framework documentation

Lopp has documented the Casa framework through:

  • Casa platform documentation — operational details of the service
  • Various essays and articles explaining the multisig collaborative-custody approach
  • Conference talks on Casa and broader custody frameworks
  • Specific guides on inheritance planning, recovery procedures, threat modeling

The framework has shaped how the Bitcoin community thinks about non-trivial custody. For holders with substantial Bitcoin positions, Casa-style approaches have become standard.

The framework is foundational for the custody section.

Bitcoin Resources at bitcoinresources.com

Lopp maintains bitcoinresources.com (formerly part of lopp.net) — the most comprehensive single aggregation of Bitcoin reference material. The site includes:

  • Technical resources — protocol documentation, BIPs, software references
  • Educational materials — books, courses, video introductions
  • Privacy and security resources — tools, guides, threat models
  • News and analysis — periodic and ongoing
  • Wallet and service evaluations — comparative analysis of various options
  • Specific topic deep-dives — on important Bitcoin questions

The aggregation is one of the most valuable single Bitcoin resources available. For someone learning about Bitcoin, bitcoinresources.com is often the most efficient entry point.

The aggregation serves as authoritative reference for specific Bitcoin questions. Many notes can cite Lopp’s curated lists for additional reading.

Statoshi.info

Lopp maintains statoshi.info — an early Bitcoin network statistics dashboard. The site provides:

  • Real-time network statistics — hash rate, mempool, transaction throughput
  • Historical data — long-term Bitcoin network metrics
  • Specific operational indicators — useful for technical analysis
  • Various visualizations of Bitcoin network state

The site has been one of the standard references for Bitcoin network statistics.

Essays and articles at lopp.net

Lopp maintains a personal site at lopp.net with substantial essay collection. Selected:

  • “I Am Become Doxxed” (2017) — the canonical doxxing essay
  • “Bitcoin Security Resources” — comprehensive security overview
  • “Bitcoin Privacy Resources” — privacy framework and tools
  • Various essays on specific custody, security, and privacy topics
  • Annual “State of Bitcoin” reviews

The essays are typically:

  • Practically oriented (operational not theoretical)
  • Technically credible (Lopp’s engineering background shows)
  • Accessibly written for serious readers
  • Updated as Bitcoin and threat landscape evolve

The essay archive is one of the most valuable single sources for practical Bitcoin guidance.

Conference talks

Lopp speaks at major Bitcoin and security conferences regularly:

  • Bitcoin Miami, Bitcoin Amsterdam, Pacific Bitcoin Festival and similar major Bitcoin conferences
  • Security-focused events — Black Hat, DEF CON, BSides events
  • Academic and developer events — MIT Bitcoin Expo, various others
  • Custody-focused events and institutional gatherings

Recorded talks are widely available through conference YouTube channels.

Twitter and ongoing commentary

Lopp’s Twitter (@lopp) is very active and substantive. Posts cover:

  • Current Bitcoin security and privacy issues
  • Specific threat analyses and warnings
  • Educational content on operational topics
  • Engagement with broader Bitcoin community discussions
  • Occasional substantive threads on specific questions

The Twitter account is one of the most useful contemporary primary-source channels on Bitcoin security and operational topics.

Lopp’s distinctive contributions

The operational self-custody framework

Lopp’s most consequential contribution is the practical operational framework for Bitcoin self-custody. The framework:

  • Hardware wallets with proper opsec (verified setup, backup strategies)
  • Multisig setups (typically 2-of-3 or 3-of-5) distributing risk
  • Distributed key storage in multiple secure locations
  • Inheritance planning for transferring Bitcoin to heirs
  • Operational security practices for daily Bitcoin use
  • Threat modeling for different user profiles

The framework is comprehensive and practical. It translates Bitcoin’s theoretical promise of self-sovereignty into actual operational practice that users can actually execute.

This framework is foundational for the entire Practical self-custody and sovereignty section. Citations to specific custody practices should typically reference Lopp’s work.

The Casa collaborative custody innovation

Casa’s specific framework — collaborative custody combining user sovereignty with professional infrastructure — is genuinely innovative. The framework:

  • Preserves user control through multisig where Casa holds at most minority of keys
  • Provides professional support for emergency situations and recovery
  • Distributes risk across multiple keys and locations
  • Enables sophisticated planning including inheritance and contingencies
  • Bridges DIY self-custody and full custodial services

The framework has been broadly influential. Other custody services (Unchained, Anchorage, various others) have developed adjacent models. The collaborative-custody category as a whole owes substantial intellectual debt to Lopp’s specific framework.

This is foundational for Collaborative custody services.

The threat-model framework

Lopp has developed sophisticated frameworks for thinking about personal threats. The framework includes:

  • Identification of specific threat actors (random criminals, organized crime, state actors, etc.)
  • Analysis of attack vectors (physical, digital, social engineering, supply chain)
  • Risk assessment by user profile (small holder vs. whale; public vs. private; geographically vulnerable vs. secure)
  • Specific countermeasures for different threat profiles
  • Trade-off analysis between security, privacy, and convenience

The threat-model framework is essential for thinking about Bitcoin operational security beyond simple “use a hardware wallet” advice.

This is foundational for Common attack vectors and the broader security framework.

The “I Am Become Doxxed” lived-experience framework

Lopp’s lived experience of being attacked produces operational guidance that purely theoretical security frameworks cannot match. The framework:

  • Specific to Bitcoin-related threats rather than generic personal security
  • Documented through actual incident rather than theoretical scenarios
  • Battle-tested practices that have proven effective
  • Honest about costs and trade-offs of various security measures
  • Updated as threats evolve and new attacks emerge

The lived-experience dimension is unusual. Most Bitcoin security writing comes from people who haven’t personally faced significant threats. Lopp’s framework has the specific authority that comes from actually defending against attacks.

This lived-experience dimension is part of why Lopp is the authoritative operational security voice rather than just one of several technically competent voices.

The Bitcoin Resources aggregation

Lopp’s curation of Bitcoin reference material at bitcoinresources.com is itself a substantial intellectual contribution. The aggregation:

  • Identifies the best resources across many Bitcoin topics
  • Organizes them coherently for different user needs
  • Keeps them updated as the ecosystem evolves
  • Provides curatorial judgment about which resources are valuable

For a reader, the aggregation is often the right starting point for any specific Bitcoin topic. Many of the notes here could productively cite Lopp’s curated lists for additional reading.

The privacy-while-public hybrid identity

Lopp’s specific approach — substantial public Bitcoin presence combined with extreme personal privacy — has been a model for many subsequent figures. The approach:

  • Maintains public Bitcoin advocacy essential for educational mission
  • Protects personal life from operational threats
  • Demonstrates that public engagement is possible for those willing to take precautions
  • Lives the cypherpunk practice of personal sovereignty operationally

The hybrid approach is hard. It requires sustained effort and substantial cost. But it has demonstrated possibility, and many other Bitcoin public figures have adopted variations of the pattern.

Lopp’s intellectual style

Several features make Lopp’s contributions distinctive:

Practical and operational

Lopp’s writing is consistently practical and operational. Where many Bitcoin thinkers operate at theoretical or philosophical levels, Lopp focuses on what users actually do. The pattern:

  • Specific concrete advice rather than general principles
  • Step-by-step procedures for specific scenarios
  • Trade-off analysis for different user situations
  • Updated as conditions change rather than fixed pronouncements

This practical orientation is what makes his work essential for actual Bitcoin self-custody.

Technically credible

Lopp’s engineering background and BitGo/Casa experience produce technically credible analysis. He understands:

  • Bitcoin protocol details well enough to identify subtle vulnerabilities
  • Wallet implementation specifics across major options
  • Multisig mechanics in depth
  • Cryptographic primitives and their failure modes

The technical credibility is essential. Operational security guidance from technically credible sources is far more useful than guidance from non-specialists.

Cypherpunk-ethical

Lopp’s frameworks reflect cypherpunk ethical commitments:

  • Individual sovereignty as foundational value
  • Privacy as essential for sovereignty
  • Resistance to surveillance through technical and operational means
  • Distrust of trusted third parties including government and corporate
  • Empowering individuals rather than relying on institutions

These commitments shape specific guidance in ways that purely-technical security advice doesn’t capture.

Accessible to non-specialists

Despite the technical depth, Lopp’s writing is accessible to non-specialists. He:

  • Explains technical concepts clearly
  • Uses concrete examples
  • Acknowledges what users actually know vs. need to learn
  • Avoids unnecessary jargon
  • Updates content for different audiences

This accessibility is what makes his work usable for a wide range of Bitcoin users, not just technical specialists.

Sustained engagement

Lopp has maintained sustained engagement with Bitcoin operational topics over many years. Where some Bitcoin thinkers cycle in and out of active engagement, Lopp has continued producing operational guidance consistently. The sustained engagement is part of why his work is authoritative.

Lopp and the Bitcoin operational tradition

What Lopp inherits

  • Cypherpunk security commitments — privacy, sovereignty, technical resistance to surveillance
  • Information security tradition — from broader security community
  • Bitcoin community engagement — from his BitGo and Casa work
  • Personal threat-management practice — lived experience post-2017

What Lopp adds

  • Casa collaborative custody framework as institutional innovation
  • Bitcoin Resources aggregation as comprehensive curation
  • “I Am Become Doxxed” framework for personal security
  • Operational self-custody guidance as practical translation of theoretical sovereignty
  • The privacy-while-public hybrid identity as model for others

What Lopp doesn’t focus on

  • Bitcoin Core protocol development — Wuille, Maxwell, others handle
  • Theoretical economic analysis — Ammous, Mises, Austrian tradition handles
  • Empirical macroeconomic work — Alden handles
  • Philosophical-moral case — Breedlove handles
  • Public-facing technical education — Antonopoulos handles
  • Trajectory and adoption framework — Boyapati handles

Lopp’s contribution is practical operational security and self-custody. Other contributors cover other dimensions; Lopp covers this one most thoroughly.

Where Lopp fits in the broader Bitcoin discourse

The operational self-custody and security foundation. Within the framework:

  • Foundational technical: Wuille (protocol), Maxwell (privacy/sidechains), Back (Hashcash)
  • Operational/practical: Lopp (self-custody and security), Casa, Unchained, various others
  • Public-educational: Antonopoulos, Lewis, various others

Lopp sits at the operational-practical junction. His role is translating Bitcoin’s theoretical sovereignty into actual operational practice.

For a reader engaging Lopp:

  1. “I Am Become Doxxed” essay (2017) — start here; foundational threat framework
  2. Casa platform documentation — for collaborative custody specifically
  3. bitcoinresources.com — for comprehensive aggregation
  4. Selected Lopp essays at lopp.net — for specific operational topics
  5. Conference talks — for accessible explanation

Pair Lopp with Andreas Antonopoulos (technical educator complement), Pieter Wuille (protocol foundation Lopp’s work depends on), and various practical-operational thinkers for the full self-custody framework.

See: Pieter Wuille, Greg Maxwell, Andreas Antonopoulos.

Counter-arguments and tensions

A serious thinker page engages the genuine debates.

The Casa commercial-relationship question

Lopp’s commercial role at Casa creates potential conflicts of interest. Critics could argue:

  • His operational guidance may favor Casa-style solutions over alternatives
  • The framework he developed may be optimized for Casa’s specific business model
  • Commercial considerations could distort security advice

Defenders argue:

  • Casa’s framework is genuinely useful regardless of Lopp’s role
  • Lopp has been transparent about his commercial commitments
  • Other multisig approaches and custody services are discussed fairly
  • The commercial-operational hybrid has worked productively

The commercial relationship is worth noting but doesn’t substantially undermine Lopp’s authority. His specific guidance on Casa-style approaches should be paired with alternative frameworks (Unchained Capital, pure self-custody, hardware-wallet-only setups) for full coverage.

The extreme-privacy lifestyle’s accessibility

Lopp’s specific privacy practices are extreme. Critics could argue:

  • The lifestyle is impractical for most users
  • The threat model applies primarily to high-profile public figures
  • Most users don’t need (and can’t afford) Lopp-level privacy
  • The framework can produce anxiety rather than effective security

Lopp’s response (implicit in his guidance for different user profiles): the lifestyle is appropriate for those who face specific threats; less extreme measures are appropriate for less-threatened users; the threat-model framework helps users determine appropriate measures for their specific situations.

The threat-model framework is essential. Different users need different security postures; Lopp’s work helps determine what’s appropriate.

The “operational paranoia” question

Lopp’s emphasis on threats and security can produce sustained paranoia in readers. Critics could argue:

  • The framework can be psychologically taxing
  • Most users won’t face the specific threats Lopp addresses
  • Operational security at high levels has substantial costs (time, money, social)
  • Bitcoin can be used effectively with much simpler approaches

Defenders argue:

  • Specific threats are real and worth understanding
  • Different user profiles need different security postures
  • The framework helps users make informed decisions about their own situations
  • Underestimating threats has been more costly than overestimating

The threat-aware framework is appropriate for serious Bitcoin holders. Casual users with small Bitcoin positions don’t need the full Lopp framework; significant holders do.

Specific custody approach disagreements

Some specific elements of Lopp’s framework have been contested:

  • Multisig vs. single-sig — some argue single-sig with strong opsec is sufficient
  • Self-custody vs. collaborative — some argue pure self-custody is preferable
  • Specific hardware wallet recommendations — choices vary by user
  • Inheritance planning approaches — multiple valid frameworks exist

These are normal scholarly disagreements about specific operational choices. Lopp’s frameworks represent one well-developed approach; alternatives exist.

Present Lopp’s framework alongside major alternatives so users can choose appropriate approaches for their situations.

Limited theoretical engagement

Lopp’s work is primarily practical rather than theoretical. His engagement with:

  • Monetary theory and Austrian framework — limited
  • Philosophical and political-economic arguments — limited
  • Trajectory and adoption frameworks — limited
  • Macroeconomic analysis — limited

…is less developed than for thinkers focused on those dimensions. This is appropriate to his role but means Lopp shouldn’t be cited as primary source on those topics.

The Bitcoin-only positioning

Lopp’s framework is Bitcoin-only — he doesn’t engage non-Bitcoin cryptocurrencies substantially. Critics could argue:

  • The broader cryptocurrency space deserves engagement
  • Other cryptocurrencies have different operational considerations worth understanding
  • Bitcoin-only positioning may reflect maximalist bias rather than substantive analysis

Defenders argue:

  • Bitcoin’s specific properties produce specific operational requirements
  • Lopp’s expertise is in Bitcoin specifically; other expertise applies elsewhere
  • Focus is a feature, not a bug
  • The Bitcoin-only framework doesn’t dismiss other cryptocurrencies; it just doesn’t address them

Bitcoin-focus aligns with the scope here. The positioning is appropriate.

Where to read Lopp

Essential primary readings

  • “I Am Become Doxxed” essay (2017) — foundational personal-security framework. Essential. The single best Lopp source for understanding the threat landscape.
  • Casa platform documentation — for collaborative custody specifically
  • bitcoinresources.com — comprehensive Bitcoin resource aggregation
  • Various essays at lopp.net — specific operational topics

Casa-specific resources

  • casa.io — the Casa custody platform
  • Casa documentation — operational details of the service
  • Casa blog and educational content

Bitcoin Resources

  • bitcoinresources.com — Lopp’s curated aggregation; substantial resource for Bitcoin learners

Statoshi

  • statoshi.info — Lopp’s network statistics dashboard

Twitter and social

  • @lopp on X/Twitter — very active; substantive engagement with security and Bitcoin topics

Conference talks

Lopp speaks at major Bitcoin and security conferences regularly. Recorded talks available through conference YouTube channels and his own channel.

Secondary works

Limited specifically on Lopp as a thinker. Useful secondary engagement:

  • Various Bitcoin security and custody books reference his framework
  • Bitcoin community discussion of specific operational topics
  • Casa platform reviews and discussions in financial media

Where Lopp fits in the broader Bitcoin discourse

The operational self-custody and security foundation. Specifically valuable for:

  • The multisig collaborative-custody framework (Casa)
  • The “I Am Become Doxxed” personal-security framework
  • The Bitcoin Resources aggregation for specific topic engagement
  • Practical operational guidance translating Bitcoin’s theoretical promises into actual practice
  • The threat-model framework for different user profiles

Recommended Lopp engagement:

  1. “I Am Become Doxxed” essay — start here; threat framework
  2. bitcoinresources.com — for navigation to specific topics
  3. Casa platform documentation — for collaborative custody specifically
  4. Selected operational essays — based on specific user needs
  5. Conference talks — for accessible explanation

Pair Lopp with Andreas Antonopoulos (technical educator), Pieter Wuille (protocol foundation), and various practical-operational thinkers for the full self-custody framework.

Open questions

Questions worth tracking:

  • The threat landscape facing Bitcoin holders evolves continuously. How does Lopp’s framework keep pace with new attack vectors (AI-enabled social engineering, quantum threats, etc.)?
  • The collaborative-custody framework (Casa-style) is currently the leading approach for significant Bitcoin holders. As Bitcoin matures, will other frameworks (pure self-custody, regulated custodians, novel approaches) become more competitive?
  • Lopp’s extreme-privacy lifestyle has been remarkable but has substantial costs. As more Bitcoin public figures face similar threats, will the lifestyle become more common or will alternative approaches emerge?
  • The Casa commercial relationship creates potential conflict-of-interest concerns. How should the Bitcoin community manage commercial expertise providers’ contributions to operational frameworks?
  • Bitcoin’s growing adoption means more users face operational security questions. Will Lopp’s frameworks scale to mass-market users, or will simplified approaches dominate at higher adoption?
  • The cypherpunk-ethical framework Lopp embodies has specific costs and benefits. As Bitcoin becomes more mainstream, will cypherpunk-style sovereignty practices remain attractive, or will users prefer more convenient approaches?

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