It is only wise to stake coins in a non-custodial wallet. Not an exchange or service which doesn't give you access to the keys or seeds tied to your crypto funds (custodial). Most people don't understand this, so they end up getting "rekt" in the process. Even when you stake coins on your own, there's always the risk of losing it all overnight. That's due to market price volatility.

If a PoS coin has a high inflation rate (APY), then it's likely prices will keep falling until it goes all the way down the drain. I'd suggest you stake (lend) stablecoins on a "De-Fi" protocol such as Aave or Compound.Finance just to be safe. Stablecoins usually retain their peg to the US Dollar (especially USDT), so you've got nothing to lose. Just my opinion