Is Bitcoin's Q-Day a Decade Away? Even Skeptics Say It's Running Late
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Bitcoin's "Q-Day"—the point at which quantum computers could break its cryptographic defenses—appears to be at least a decade away according to multiple analyses, with even prominent quantum skeptics now acknowledging that progress in fault-tolerant quantum computing is slower than previously feared. Consensus across sources indicates that current quantum hardware remains orders of magnitude short of the millions of stable qubits required to run Shor's algorithm against Bitcoin's ECDSA signatures. The key implication is that Bitcoin retains a substantial security buffer, allowing time for the ecosystem to implement quantum-resistant upgrades such as post-quantum signature schemes before any realistic threat materializes.