Quantum fixes protect Bitcoin, but legit owners risk lockout

What happened

Nic Carter's hypothetical attack highlights why safer signatures would leave an ownership choice for holders unable to migrate or prove prior control. Glassnode's May 20 analysis identified 6.04 million BTC, or 30.2% of then-issued supply, with public keys already exposed .

Read the full story on CryptoSlate Understand the crypto stories that matter and what to watch next. 15, 2026 3 min read Quick Take 01 A modeled 50,000-output Bitcoin sweep fits a 10-block weight budget, assuming hypothetical key recovery and miner inclusion.

02 Glassnode's May estimate measured 6.04 million BTC with exposed public keys, leaving permanent key loss and dormant ownership as separate questions. 03 Draft sunsets, spending throttles and advance ownership proofs offer different protections, with recovery depending on holders' evidence and adoption.

Make CryptoSlate preferred on Share Share 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. The stakes extend beyond choosing stronger cryptography. The scenario assumes a future quantum machine capable of breaking Bitcoin's key cryptography.