Yes, BNB would have been a great investment, maybe it still is one. I am just really wondering if a token of any of the dozens of other exchanges can make the same growth as BNB did. With so many exchanges around, and new ones seem to still pop up, there must be one that can become a real competitor of Binance.
In the near there isn't any big exchange to compete and stand equal to Binance coin. At present Binance is quite progressive as it is well integrated with the exchange services. Recently when the entire cryptocurrency market was in the downtrend Binance grew high. This itself a good growth process, and the IEO launch with BNB pairing makes it grow over that period.