
The Delphi Podcast Nic Carter: Quantum Threatens $600B of Bitcoin
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Jan 9, 2026 Nic Carter, a partner at Castle Island Ventures and crypto researcher, dives into the existential threat that quantum computing poses to Bitcoin. After extensive research, Nic warns that the community is ill-prepared for a 'Q-Day' that could see 2 million of Satoshi's BTC vulnerable to attacks. He discusses the urgency for migrating to post-quantum cryptography and highlights a potential 'trillion-dollar bug bounty.' With parallels to historical nuclear secrecy, Nic underscores the need for immediate action to safeguard Bitcoin’s future against this looming threat.
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Quantum Became A Material Risk In 2025
- Quantum computing moved from theoretical to material risk after concentrated advances and investment in 2025.
- Nic Carter warns the consensus among physicists shifted and large institutional capital now treats it as credible.
Satoshi’s Coins Are Unfixable Without A Fork
- Satoshi's ~1–2M BTC are stored in legacy P2PK formats exposing public keys and are irrecoverable without an unprecedented fork.
- Carter says moving those coins requires collective action equivalent to confiscation and would break core governance norms.
Address Reuse And Taproot Create Broad Exposure
- Address reuse and Taproot reveal public keys making a large fraction of BTC (hundreds of billions) vulnerable.
- Carter estimates a third or more of supply could be exposed unless owners migrate to post-quantum formats.

