Why Jack Mallers Walked Away From Twenty One

— Jack Mallers' exit from Twenty One: He describes carrying guilt and humility over his vision for the company not working out, while crediting his co-founders' stewardship and the company's strong market position (second-largest Bitcoin corporate treasury, NYSE-listed).

— Strike's positioning: Mallers frames Strike as occupying the middle ground between operating companies like Coinbase and conviction plays like MicroStrategy—generating real cashflow and products while maintaining deep Bitcoin focus.

— Coldcard vulnerability and self-custody: The incident is described as "horror" because victims did everything correctly. Mallers emphasizes the bug was in entropy generation and advocates for Bitcoin Core on an offline machine as an underrated self-custody option over hardware wallets.

— AI security and code auditing: Strike now uses AI agents as a red team to identify vulnerabilities at scale, shifting the scarce resource from finding problems to determining which ones are real, reproducible, and economically significant.

— US versus China AI strategy: Mallers criticizes the US approach of restricting model access as "shameful," contrasting it with China's open-source strategy. He attributes this partly to economic desperation—frontier labs are unprofitable and need government protection from competition.

— Self-custody best practice: Run Bitcoin Core on an offline machine to generate and secure your own keys, rather than relying solely on hardware wallets with uncertain entropy generation. This method uses the most audited codebase available.

— Monitor AI-driven vulnerability discovery: As AI agents become routine for finding security flaws, custody and software providers using this approach (like Strike) may surface and patch issues faster than those using manual review alone.