Recently, I've been looking at the APYs of a few yield aggregators again. The numbers look pretty attractive, but just thinking about the fact that behind them are a series of contracts and a bunch of counterparties makes me hesitant to jump in. To put it simply, the "revenue" you get might be from lending interest, incentive subsidies, shared security rewards from re-staking, or even layered incentives from other protocols... Recently, someone also complained that the stacking of yields is like a "matryoshka doll," and indeed, the more layers there are, the risk isn't linear; you simply can't tell how much you're actually exposed to. I can hard-code parameters in my quantitative backtests, but on-chain contract upgrades, permissions, multi-signature setups, liquidation mechanisms—anything could unexpectedly change at any time. I’ll stop being greedy for now and first revoke the permissions I previously granted haphazardly.