Google's Quantum Echoes milestone does not threaten Bitcoin today
- —Quantum Echoes ran 13,000x faster than classical machines on 105 Willow qubits, but breaks no ciphers
- —Google's estimate puts breaking ECC at under 1 million qubits, down from billions
- —Public keys of roughly 6.9 million BTC, about 34% of supply, are already exposed on-chain
- —Experts put Bitcoin's post-quantum migration window at 2029-2032
Why it matters: The quantum debate is shifting from theory to engineering: migrating millions of BTC will take years, and work must start well before a capable machine exists.
Source: The Crypto Times