The recent Coldcard incident is a reminder that in Bitcoin, security is a process, not a product. More than $88 million in Bitcoin has now reportedly been stolen after attackers exploited a flaw affecting seeds generated by vulnerable versions of Coldcard firmware. What many considered one of the most trusted hardware wallets has become the center of one of the biggest wallet security incidents in Bitcoin's history. This event teaches us several important lessons. First, no wallet manufacturer is infallible. Whether a wallet is open source, Bitcoin-only, or highly respected, software and firmware can still contain critical bugs. Second, self-custody comes with responsibility. The phrase "Not your keys, not your coins" remains true, but protecting your own keys also means staying informed, applying security updates, and reviewing your security model over time. Third, trust must always be verified. Bitcoin was built on the principle of minimizing trust. That principle should also apply to the tools we use. Hardware wallets are excellent tools, but they should never be treated as perfect or beyond question. For anyone holding significant amounts of Bitcoin, this is also a reminder to think beyond a single device: • Keep firmware up to date. • Follow security advisories from wallet manufacturers. • Consider using passphrases where appropriate. • For larger holdings, evaluate multisignature setups to reduce single points of failure. Incidents like this can shake confidence, but they also strengthen the Bitcoin ecosystem. Every major security event pushes developers, manufacturers, and users to build better practices and more resilient systems. Bitcoin itself was not hacked. A wallet implementation was. Understanding that difference is essential. Security is not something you buy once. It is something you continuously build. #Bitcoin #SelfCustody #CyberSecurity #HardwareWallet #Coldcard #OpenSource #BitcoinEducation