Google Quantum 40x Breakthrough Rekindles Fears of Q-Day

Google reported a 40-fold reduction in quantum error rates and 99.9% accuracy, reviving discussion of a future 'Q-Day' that could threaten Bitcoin's elliptic-curve signatures. The article notes no existing machine is close to breaking Bitcoin's cryptography, so the risk remains theoretical. Traders may see periodic quantum headlines as a bearish narrative overhang on BTC, though there is no near-term fundamental impact.