BNB coin is been used as a utility token on binance platform which allows us to gain some discount on the trading fees. This would be the same even after 5 years because BNB is a coin backed by binance exchange and its main function would be to support internal monetary affairs in between the platform. There would perhaps be some more benefits of holding BNB coin after these 5 years as even now we are able to stake and lend BNB to gain some profits.

I can surely say that BNB would have a major pump after these 5 years because of its ever rising demand and huge benefits offered to the holders. Many traders prefer to pay their trading fees with BNB rather than using any other coin just to save some bucks on fees.