On-chain revenue surged to $20 billion in 2025, primarily driven by the growth of decentralized finance (DeFi) platforms, according to a report by crypto investment firm 1kx. In the first half of 2025, users paid $9.7 billion in on-chain fees, marking a 41% increase from the same period in the previous year. DeFi platforms accounted for 63% of all on-chain fees, with significant contributions from trading activities on decentralized exchanges (DEXs) and derivatives platforms. This growth underscores the increasing adoption and utilization of DeFi services in the cryptocurrency ecosystem.