Bitcoin hardware wallet hacks force a rethink of self-custody

Flawed Coldcard firmware and tampered Ledger devices drained an estimated nine figures from users in 2026, reopening the debate over how to hold your own keys Hardware wallets were supposed to be the safe answer to crypto’s oldest warning: not your keys, not your coins. In 2026, that answer developed some uncomfortable footnotes. A Forbes analysis frames the year’s Bitcoin hack losses at more than $500 million. Axis Intelligence estimates total hardware wallet losses for the year exceeded $240 million, with the research placing the figure at approximately $241 million when the major incidents and other reported attacks are combined. The first incident hit Coinkite’s Coldcard devices. A flaw in Coldcard firmware weakened the randomness used to generate seed phrases.

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