Blockchains, designed as transparent and decentralized systems of trust, are facing new challenges in the age of AI. With nearly half of internet traffic being generated by bots, up to 80% of blockchain transactions are now automated. AI agents are dominating onchain activity, causing congestion, higher fees, and monopolizing resources. Steven Smith, head of protocol and applied research at Tools for Humanity, emphasizes the need for humans to protect blockchains from unfair advantages, attacks, and high gas fees. The increasing presence of AI bots in networks is driving up gas fees, manipulating DeFi markets, and causing network failures. This trend extends beyond blockchain networks, impacting the entire economy and traditional financial services. AI-powered bots are disrupting banking, leading to security concerns like DDoS attacks. Despite efforts to improve scalability, issues persist as bots exploit faster and cheaper transactions. Smith advocates for proof-of-human infrastructure to verify users and prioritize human control over automated systems. Implementing gas subsidies for humans during network congestion and safeguards against bot-driven spam can enhance efficiency. The focus should be on ensuring positive experiences for real users while distinguishing between humans and bots online. The future of blockchain hinges on maintaining human-centric control to ensure fair access, security, and sustainability. It is crucial to act now to preserve the core promise of decentralization and bring more humans into the blockchain ecosystem.