I would keep your money in ETH unless something stands out to you as not only a good product, but underhyped.
It's not only ETH that you can buy into an ICO with, it just seems recently that a lot of devs are taking advantage of ETH and releasing tokens.
The whole ICO landscape is becoming similar to the way altcoins for a period were created purely to scam. Whichever one you decide to invest in try to do a good bit of research.