Decentralized doesn't necessarily secure. Many rug pull has happened in DEFi. And many Defi protocols use Celsius for yield because of their access to large institutions and even sovereign wealth fund. Celsius is a big business like Coinbase with checks and balances to not lose customers funds. So if that makes you uncomfortable, it's probably not for you. :-)
If your stock picks work then great! But beware, these guys are usually great in bull markets and terrible in the bear market. Good luck!