According to Cas Abbé, the main crypto revenue streams in 2025 are staking and yield farming, transaction fees, access to financial products, and campaign rewards. Traders should note that staking and yield farming remain strong, offering competitive APYs across major DeFi platforms, with Ethereum and Solana leading in locked value (Source: Cas Abbé Twitter, June 9, 2025). Transaction fees continue to impact net returns, making layer 2 solutions increasingly relevant for cost-effective trading. Access to decentralized financial products, including lending and derivatives, is expanding, giving traders more options for portfolio diversification (Source: Cas Abbé Twitter, June 9, 2025). Campaign rewards from protocols and exchanges are providing short-term yield opportunities, especially during new launches. These revenue streams drive liquidity flows and influence short-term price volatility, directly affecting trading strategies in 2025.