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Coinbase CEO Flags Quantum Computing as Existential Crypto Threat
Coinbase CEO Brian Armstrong has stated publicly that quantum computing represents a larger long-term threat to cryptocurrency than artificial intelligence, characterizing the timeline as “when, not if” for quantum systems capable of breaking the elliptic-curve cryptography securing Bitcoin, Ethereum, and most other chains. The remark surfaced in a Yahoo Finance interview where Armstrong contrasted the speculative nature of AI-related crypto risks — such as autonomous agents manipulating markets or generating deepfakes — with the mathematical certainty that sufficiently powerful quantum computers will render ECDSA and related schemes obsolete. He did not specify a horizon, but the industry typically cites 10–20 years for cryptographically relevant quantum
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