I'd spend ETH on a game with limited number of collectible units to make sure I could sell it later at a higher price.
And this game must be funny.
Buy weapons on realityclash augmented game which will be released this october. There is a higher chance of your ETH to multiply more than 10x, these collectible weapons are limited only which they are going to be rare later on when released worldwide. Weapons can be sold in the market for more than its current price as its not going to be available in the market soon.