Vitalik Buterin: AI Will Become Blockchain’s New UI, Security Extends to Silicon

Buterin's framing treats AI as the interface layer rather than a feature bolted onto wallets, which reframes the trust boundary: if agents author and sign transactions, the meaningful custody question moves from key storage to the hardware and models doing the signing. That is a governance and threat-model shift as much as a UX one, and it lands hardest on wallet providers, signing infrastructure and hardware makers whose assumptions about human-in-the-loop confirmation no longer hold. Whether cheaper, more private execution and silicon-level security arrive together, or diverge, is the open question.