At first glance, DeFi makes yield look effortless. The IllusionHigh APYs and simple flows create the perception that yield is easy. But behind every number is a complex system. The GapDisplayed yield often ignores costs such as gas, slippage, and volatility. What looks like 20% can shrink significantly in practice. Where Yield Comes FromYield is generated through trading fees, lending, arbitrage, and incentives. Some sources are sustainable, others are temporary. Hidden Value TransferIf you d...