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Can Quantum Computing Actually Break Bitcoin?
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Can Quantum Computing Actually Break Bitcoin?
KEY TAKEAWAYS Google Quantum AI published a March 2026 whitepaper estimating that breaking Bitcoin's ECDSA 256 encryption requires 20 times fewer qubits than previously projected in 2019. Roughly 6.9 million BTC, approximately 32% of the total supply, sit in wallets with public keys already exposed on the chain. Researcher Giancarlo Lelli cracked a 15-bit elliptic curve key on 24 April 2026, winning a 1 BTC bounty from quantum security firm Pr…
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