As some people has mentioned here, its impossible to predict the future price of anything, especially cryptocurrencies due to it volatile aspect. However, when you are investing you should look at the fundamentals of the investment. Here is some information on BNB:
The only usage of the BNB token before was trading fees but now there are many more use cases. In order to participate in Binance's initial exchange offering (IEO), you need to hold BNB for a certain period of time on the exchange. Also, since the recent release of the Binance Chain (their own blockchain), BNB is now to utility token of the network. In terms of use cases, it seems like there are more ways to utilize BNB. BNB is the token of Binance exchange which is now one of the biggest exchanges in the world and also there is Binance Chain which seems to want to compete with Ethereum. They also have Binance DEX (decentralised exchanges) but it will be interesting to see if Binance DEX can succeed or not. Also, some of the profits from the exchange is used to buy back bnb and removed from the supply.
This is not financial advice btw, just a few things about BNB. Do I think it will rise in the next 5 years? Well, I'll don't give advice on that.