Google Willow 2 Quantum Breakthrough Spotlights Bitcoin ECDSA Attack Risk

Google announced its “Willow 2” quantum processor, claiming major speedups on prime-factorization tasks. The article links this to a potential quantum threat to Bitcoin’s ECDSA signatures, the core cryptography behind nearly all Bitcoin addresses. Developers are already working on post-quantum cryptography (PQC). A discussed emergency route is a “quantum soft fork” using one-time signature schemes such as Lamport or Winternitz. However, the transition is framed as risky: if users move funds to new quantum-resistant addresses, large amounts of dormant or “lost” Bitcoin—including an estimated Satoshi stash—could be exposed to the first actor achieving cryptographic supremacy. Traders are reportedly pricing a “quantum risk,” with BTC/USD showing unusual volatility divergence as the market digests the accelerated push to strengthen the ledger. For traders, the key takeaway is higher headline-driven volatility risk if Bitcoin’s security assumptions face a faster-than-expected quantum timeline.