Staking through Lido and the yield chain that follows

Ok, so if I stake ETH from Ledger using Lido, I get stETH back based off how many ETH I put in. Staking in Lido is 4.9ish %. I can then take that stETH, put it in the curve liquidity pool for crvstETH, then can take that and put it in Yearn finance for yield in 2 different pools while staking eth, securing the network, and earning the initial apy?

Can this daisy chain be expanded upon, or is that about all she wrote? 20% apy on eth is pretty ridiculous.