Everything will depend on what position Binance will occupy on the crypto market. If this exchange repeats the fate of FTX, then BNB can wait for something similar. I wouldn't consider such a long term investment as it's too risky to just hold BNB for 5 years. At the next bull sell early and then look at the situation, but the same behavior as in the case of holding bitcoin should not be applied to BNB.
Binance might fall, but that will not be like FTX. SEC can force them to wrap up their operations with Binance and operate outside of the USA. The only thing that can tear down Binance is a major hack. Binance offers most of the utilities of BNB, so if anything happens to Binance, BNB will face the consequences.
Everyone also thought that FTX would not be like MtGox, but it turned out to be a bit worse than the crowd expected. FTX not only went into debt, but was also hacked. There's no telling how shaky CZ's empire is. He may be telling us everything is fine, but in reality things are on a powder keg there. Huge projects can also go bankrupt and close down very lightning fast. Then they will pay investors their money for decades, like the infamous MtGox.