Binance has proved too much already and they are so far the best crypto exchange so their coin is the best exchange coin to hold at this moment but aside for this coin, there are some exchange coins that is also good to hold at this moment.
The main factor that made Binance great was that their exchange continued to increase, even though the hacked issue occurred but because they had a good team and technology it did not make investors run away, especially the many IEO projects that made the BNB skyrocket.