I didn't buy tokens during ICO (I never risk that much) but I think that electroneum has very good chances to become something big. People love playing games and mining via mobile game playing sounds very original and promising. I hope they will manage to realize their project technically, because this is the biggest problem that might occur. What is phone accumulators will not be able to stand the game? I suppose they took that into account but I've never come to a strict explanation of such things.