I am a big fan of Ethereum as well as BNB. Well there are actually several advantages of holding BNB on Binance. I currently have 3 BNBs that I bought at around $640. Yes, the price fell but still if you have a long term vision, you don't worry about the $ value but just about the BNBs you hold. My goal is to try to increase the amount of BNB that I have in my wallet.
One way to do it is to stake the BNBs for like 3 to 6 months with above 5% APY. I also have several other tokens staked and in savings - everyday, I convert the small amounts to BNBs and either stake them or I put them in launchpools to farm new tokens on Binance. With the launchpool, you receive rewards every hours. No need to say, once I receive these rewards, I convert them to BNB again. One small problem with doing this conversion is that there is a conversion fee to pay - but trust me it's a very little amount.
Do not focus on the dollar value but just on the unit of tokens you hold if you are planning to be rich in the long run. Rome wasn't built in one day and you will not be rich within a few weeks or months - unless you are very lucky to catch the right token that pumps.
I hope your investments goes successful and you become very rich.