$BNB the ONLY coin where you can invest in the exchange. This will be a top coin for chinese/international traders. Eventually it will only be 100M supply.
BNB is really the best exchange coin at the moment. Until I see even obvious competitors with it.
Based on profitability it is right now, other exchange token like KCS and Huobi Token are also a good investment but BNB beat these two even if they'll combine. Binance gain the trust of the people that's why its easy for them to create some hype that would make their IEO successful, more success in IEO would result to more demand in BNB.