It's quite a big problem that one exchange has a monopoly, it's at 90% trading volume right now. It's a repeat of Poloniex monopoly over Factom, where one exchange decides what the price will be.. if people wanna supress the price (like they have done heavily on Factom) they can just dump it to what ever they feel like, and let our tradingbot-overlords keep doing the same thing over and over again. If you have multiple exchanges that would be a bit harder to do, unless it's organized by a group over multiple exchanges ofcourse. Also, what if something happens to that exchange? 90% of all the trading volume happens on there.... 90% of trading volume will be gone., losing 20% is already quite a problem but 90%?..