Ethereum Co-Founder Warns of AI Control Risks by Big Tech Firms

The next significant turning point in the crypto space is being driven by advancements in artificial intelligence, according to Joseph Lubin, CEO of Consensys and co-founder of Ethereum. In a recent conversation with CoinDesk, Lubin highlighted the potential for autonomous or semi-autonomous agents to engage in transactions, coordination, and verification on decentralized networks, leveraging crypto infrastructure as the foundation for machine-driven activities. Lubin, who is set to speak at Consensus Miami 2026, expressed his support for the concept that blockchain technology is well-suited for machine intelligences but does not envision humans being replaced. Instead, he foresees increasingly sophisticated interfaces simplifying complexities, allowing users to interact with crypto systems through intent rather than manual inputs, with AI serving as the intermediary layer between people and protocols. However, this vision also comes with risks, particularly if AI infrastructure remains concentrated among a few large technology companies, which could lead to trouble, as per Lubin's warning. He emphasized the importance of decentralized systems and cryptography in ensuring accountability, enabling machines to transparently and verifiably 'check on one another.' As part of this broader shift, products like MetaMask are evolving. Lubin described the wallet as being rebuilt into a 'new kind of neobank that you own and control,' reflecting a transition toward a 'personal money operating system.' AI-powered agents could potentially act on behalf of users, managing assets, executing transactions, and navigating the growing decentralized economy, allowing individuals to carry their personal financial system in their pocket. Beyond interfaces, Lubin pointed to structural changes within the Ethereum ecosystem, including the rise of 'corporate chains' as companies seek higher throughput and greater control over their infrastructure. He believes assets are best issued on Ethereum's base layer to ensure durability, even if they are later used across other networks. Stablecoins represent a 'stepping stone' toward more fully decentralized financial systems, though current models rely heavily on centralized issuers. Over time, Lubin expects growth in decentralized collateral to enable more robust, crypto-native forms of money. Regarding tokenization, Lubin suggested that traditional finance and decentralized finance are converging, combining centuries of financial innovation with newer blockchain-based systems, resulting in a more granular and programmable global economy. While acknowledging longer-term technical risks like quantum computing, Lubin adopted a measured tone, stating that Ethereum developers have been preparing for years and see it as part of Ethereum's natural evolution.