Estimates keep falling: Bitcoin's quantum countdown accelerates
- —6.4M BTC (32.2% of supply) sits in wallets with exposed keys; ESAs put the figure at 6.9M BTC
- —Google cut the ECDLP-256 break threshold to under 500,000 qubits, targeting 2029 readiness
- —ECDSA.fail drew 400+ circuit designs, cutting attack cost 86% to 1.496 billion Toffoli-qubits
- —P2PK addresses and reused-address wallets are exposed, including Satoshi's 1.1M BTC
Why it matters: The quantum risk is shifting from theory to planning: holders and custodians must prepare a migration to post-quantum cryptography.
Source: FXStreet Crypto