As, all we know that Binance smart chain projects are more trending these days. I am interested to invest in these BSC , which one is best for 2021?
You must answer a question that why people like Binance Smart Chain and projects one the chain?
If the answer is simply because of cheaper transaction fees than in ERC_20 chain, it is no convincible. Fees will be high, expensive then cheap. In crypto, many altcoins have very very cheap transaction fees because price of coins are very very cheap. This basic cheap specification does not help them to have too much transactions per second Tx per second. Price is low as well.
You must differentiate between good projects and bad projects. Chains, BSC, cheap transaction fees don't make good projects.