For years the whole pitch behind a Coldcard was that nobody could reach your Bitcoin unless they were physically holding the device in their hands.
That promise came apart this week, when an attacker quietly swept around 1,082 BTC, worth roughly $70 million, out of more than a thousand wallets in under an hour. The unsettling part is that the thief never touched a single device, never phished anyone, and never needed a PIN or a password. These coins were sitting in cold sto...
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