Binance SmartChain is a copy of Ethereum with a few settings changed. So it is faster, cheaper but LESS SECURE. That is from a blockchain developer who works on blockchain every day and he has stated that exact thing multiple times.

When Ethereum's updates are put into effect, it will become cheaper and faster so Ethereum will gain more business uses and more new businesses will work with and on Ethereum.
Binance SmartChain may do things well but do other companies build things on it like they do on Ethereum? Almost all NFT and almost all new coins are made on Ethereum.

Now, that doesn't mean that Binance SmartChain is not a good or even great investment, it's just information.