Bitcoin Has 3 Years to Survive | Nic Carter on Bitcoin’s Quantum Vulnerability

Bitcoin’s governance is spectacularly unsuited to a threat that requires total mobilization, and the complacency on the Bitcoin side is matched only by the Ethereum Foundation’s proactivity. That is the central tension Nic Carter brings to this episode of Bankless: Bitcoin faces an existential cryptographic threat from quantum computing, and its culture of deliberate stasis—historically its greatest strength—may now be a fatal weakness.

The Quantum Threat Just Got Closer

Two papers released in the same week dramatically lowered the resource estimates needed to break the elliptic curve cryptography (ECC-256) that secures Bitcoin. One from Google (authored by Dan Boneh, Justin Drake, and the Google Quantum AI team) and one from the startup Quatomic with Caltech researchers both improved Shor’s algorithm—the method for cracking ECC—by factors of 20x and 50x respectively. The Google paper estimated that a sufficiently powerful quantum computer could crack a Bitcoin public key in about nine minutes, enabling an “on-spend attack” where a transaction is intercepted before it confirms. The Quatomic paper, using a neutral atom architecture, suggested ECC could be cracked with as few as 10,000 physical qubits—a threshold that is within range of existing hardware arrays, though not yet at the necessary fidelity.