Sumokoin has too low volume for my liking. It is a fork of Monero with some changes but nothing revolutionary. I think it is good investment for people who have patience to wait for a pump but that's when you should sell and take profit. Pump is highly likely because of current low volume so it will be easy to boost price even with moderate capital.
True that, I didn't know about that coin so far but now read some stuff and I bet Sumocoin can be really attractive for investments