stake

I just watched a video at kraken about staking assets with them. Some assets promise 8 and up to 26% ARP The fact it's not possible to stake that many crypto assets makes it complicated to figure out which one to stake. I mean, why isn't it possible to stake USDT or USDC or other more...

Can someone explain to me what the risk is to Stake my Ethereum with Ledger? Of course, I would like to make money from having my cryptos deposited in my Ledger hardware wallet. And they offer to Stake them. Is there any risk and can I get my money back quickly if I need it?