Quantum Computing Got 20x Closer. It Threatens A Third of All Bitcoin

This episode of Unchained dives into a pivotal moment in the quantum computing timeline, where breakthroughs from Google and Oratomic suggest that cryptographically relevant quantum computers could emerge by 2029—potentially 20 times faster than previously estimated. The Google paper, co-authored by Ethereum Foundation’s Justin Drake and Stanford’s Dan Boneh, presents a zero-knowledge proof that a quantum computer could break elliptic curve cryptography (ECC), the foundation of Bitcoin, Ethereum, and most digital assets. Oratomic’s Delev Blustein shares that their research shows Shor’s algorithm could be implemented with as few as 10,000 reconfigurable atomic qubits—50 times fewer than prior estimates—making utility-scale quantum computers far more feasible. The episode explores the implications: Bitcoin’s public keys are exposed in the mempool, making 'on-spend' attacks possible within minutes, and lost or stolen coins could be recovered. The threat isn’t limited to Bitcoin; Ethereum, stablecoins, and layer-2 networks face similar risks. Despite skepticism from some cryptographers like Matthew Green, experts agree that the timeline is accelerating and that migration to post-quantum cryptography must begin now. Project 11’s Alex Pruden emphasizes that the real danger isn’t just the existence of quantum computers, but the window of vulnerability during migration—especially for Bitcoin’s slow block times. The show concludes with a call to action: developers, communities, and institutions must act immediately, using testnets, new wallet tools, and research to build post-quantum resilience before Q-Day arrives.