Quantum fixes protect Bitcoin, but legit owners risk lockout

Crypto investor Nic Carter's worst-case quantum scenario consists of a hostile actor recovering the keys to dormant Bitcoin, then broadcasting a wave of spends across 10 blocks. In his Oct. 13 interview with Luke Martin, Carter says early coins moving together could shake confidence in the network . The stakes extend beyond choosing stronger cryptography. Glassnode's May 20 analysis identified 6.04 million BTC, or 30.2% of then-issued supply, with public keys already exposed . The scenario assumes a future quantum machine capable of breaking Bitcoin's key cryptography. Google's published research models future resources for such an attack , and Bitcoin key recovery remains undemonstrated in that work. Large early outputs can nevertheless make a rapid transfer possible on block-space grounds.

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