I wouldn't stake coins in a centralized exchange due to the fact that they always get hacked or turn bankrupt in an instant. The risk is simply too high to bear. If you're keen on staking, I'd suggest you do it on a decentralized platform, or through the network itself. If there's a promising altcoin I'd pick (which can be staked), that would be ETH. It has the biggest ecosystem of dApps, tokens, and services around it. Not to mention, ETH is far more decentralized than BNB itself. Vitalik promised to fix centralization issues with subsequent network upgrades, so it's likely ETH will last for a very long time.

Saying that ETH will be "replaced", is like saying BTC will replaced by another cryptocurrency (which is something very unlikely to happen). Just do your own research before making any investment to help determine what works best for you. As long as you don't invest more than what you can't afford to lose, there should be nothing to worry about. Just my two sats