Ethereum co-founder Joseph Lubin has highlighted potential risks associated with the centralization of AI infrastructure, warning that control by a few large tech companies could pose systemic threats to the emerging 'machine economy.' Speaking to CoinDesk, Lubin emphasized the importance of blockchain and cryptographic networks in creating a balanced environment where autonomous AI agents can operate securely and equitably. Lubin also discussed the evolution of MetaMask into a self-custodied digital bank, which will eventually integrate AI agents to manage assets and execute transactions autonomously. He stressed the importance of using the Ethereum mainnet for asset issuance to maintain security and trust. Additionally, Lubin noted the gradual shift towards decentralized collateral systems in stablecoins and asset tokenization, while expressing cautious optimism about the long-term challenges posed by quantum computing.