Investing in ICO is actually a very risky thing to do honestly as long as you are not a very sound investor who would know how to filter out a good ICO and at least use that one to minimize the risk to some pretty good extent and as long as you can do this, it is actually worth it most of the time.
Nevertheless, holding bitcoin and ETH or any other good potential coin is already an investment and considering how the BTC and ETH market has been doing though, the any holder should be fine in the long run rather than struggling with ICO. Instead of trying to contribute in ICO, I do try to hunt the bounties because of I am ready to spend my time and efforts rather than my hard earned money.