https://bennet.org/blog/thoughts-on-the-coldcard-incident/

The Coldcard RNG failure is a reminder that entropy is the most overlooked part of Bitcoin self-custody. I've just updated my interactive explainer on entropy and mnemonic seeds to cover what happened: https://bennet.org/learn/how-secure-is-your-bitcoin-wallets-mnemonic-seed-phrase/ If you're affected by this issue, secure your funds first - don't wait.