Crypto entrepreneur Nic Carter is pressing Bitcoin developers to make quantum-resistant cryptography a priority, warning that failure to act could hand an advantage to Ethereum, which already has a public post-quantum roadmap and a dedicated team. Carter says elliptic curve cryptography (ECC), the foundation of Bitcoin address and signature security, is becoming obsolete in the face of advancing quantum computing and must be addressed sooner rather than later.
Bitcoin derives public addresses from private keys using ECC. That reliance creates concern that sufficiently powerful quantum machines could expose private keys and undermine the network’s security model. The Bitcoin community remains split: some advocates want proactive cryptographic upgrades, while others fear that intervening on core protocol elements would violate Bitcoin’s conservative upgrade norms.
Carter has urged developers to embrace what he calls cryptographic mutability—the ability for a blockchain to swap out its core cryptographic primitives when needed—rather than treating cryptography as immutable protocol plumbing. He argues the critical question is how fast developers accept and build that flexibility into their networks.
Analysts have flagged the long-term stakes: ARK Invest estimated in March that about a third of BTC could be vulnerable to a quantum attack, while noting the threat is not immediate. Carter points to Ethereum’s public planning as a competitive edge. The Ethereum Foundation has listed post-quantum security among its strategic priorities, published a roadmap targeting post-quantum changes by 2029, and identified specific areas for work—validator signatures, account structures, stored data and cryptographic proofs—some of which Ethereum co-founder Vitalik Buterin has discussed publicly.
Carter has criticized Bitcoin Core contributors for resisting quantum-related proposals such as BIP-360 and accused some in the community of denial and gatekeeping. Developers involved with the proposals push back on that characterization. Ethan Heilman, a BIP-360 co-author, said Core contributors have engaged with the draft and that the proposal has attracted an unusually large volume of comments for a BIP.
The timeline gained urgency this week when Google said it expects to complete its internal migration to post-quantum cryptography by 2029, warning that quantum computers will eventually threaten current encryption and signature schemes. That broader industry timeline has amplified the debate in blockchain circles about how quickly projects should change cryptography and how to do so without undermining decentralization.
Questions remain: which post-quantum schemes will prove secure in practice, how to implement upgradeability that preserves decentralization, and how to balance cautious conservatism with timely action. For now, Ethereum’s public planning and organized effort stand in contrast to ongoing disputes in the Bitcoin development community over the right approach and pace of change.
Readers are encouraged to verify details independently and follow the ongoing technical discussion within both ecosystems.