For fifteen years, Bitcoin’s core promise sold itself in five words: not your keys, not your coins. Hold your own hardware wallet, and no exchange collapse, no bank freeze, and no government seizure could touch you. A new wave of sweeps against Coldcard-generated wallets began early Monday and was still running hours later, according to Galaxy Research. Combined with three earlier waves dating back to 30 July, the running total has climbed to roughly 1,816 BTC, close to $114 million, drained from more than 5,200 addresses. Keys that owners believed were cryptographically unguessable turned out to be reconstructable offline by anyone willing to work through the possibilities.