Ethereum co-founder Vitalik Buterin warned that advances in artificial intelligence in mathematics could undermine existing cryptographic signatures and some post-quantum defenses. On October 7, he advised cryptocurrency holders to reduce their risk exposure where feasible, such as by using addresses whose public keys have never been exposed, but also cautioned against rushing to transfer funds to new wallets, as the risks from migration errors could be more immediate than proven cryptographic breaches. Buterin noted that recent advances, such as OpenAI's machine learning-generated mathematical proofs, could erode the security of post-quantum defenses like lattice-based cryptography within the next two years and prompt Ethereum to shift towards hash-based security designs. He emphasized that if AI could bring 50 years of mathematical progress in two years, it could significantly improve attack methods against elliptic curves or lattice problems.