BTC is highly recommend if you want to invest in crypto wold because as we all know that BTC is the king and no one can fall it down and also btc is good for long term investment it will make you rich if the price will go Up. But Op remember this if you have 2BNB right now then you can also hold it because bnb is also a good coin for investment. But the last decision are yours if you want o trade you le bnb to btc or just hold your bnb.
Actually Op does not need any other alternative suggestions other than converting to Bitcoin or holding 2 BNB for the long term, I think for the 2 options above and the OP can add other assets in the portfolio for the long term, but regarding investment that must be prepared for risk so anything depends on personal decision.
Yes all we can do or all we can help to OP is our suggestions but it's up to him if he follow our suggestion or let himself decides what he want to do because the last decision are with him. But for now it's good to have a coins who can bring you victory in the near future, like BNB, Bitcoins and even ETH in the Op hand he have 2BNB which very good amount to start in investing .
He can use it for doing more research about the project that we are giving him, it's good to start from somewhere and not to quickly follow and invest his money, but a good sources of references, he needs to keep reading and doing the research. Nothing in our hands for him to decide, but just a good guide on how to pick and sort a good project for his investment.
All the decision making will be on his own. Just take a closer look and DYOR before diving in to whatever project he decides to invest his money.