The problem isn't the number of exchanges really. It's that's the main exchange for this coin is Craptopia. What's the use when you buy a bunch of Sumokoin and you can't withdraw it it to your own wallet because Craptopia's withdrawal system is broken and they have no idea when the problem will be rectified?

Do Sumo a favor and ditch this poor excuse of an exchange on the first chance you get. The sooner, the better.