Potential ICOs are very good but you still have to be very careful before investing in any ICO.
It takes a lot of work too, to be able to fish out a promising ICO from a wrong one these days, but if you can hit the right one and even wait for a little bit time after it has been listed, maybe months or even a year, then you will be surprise the profit you are going to be making on your investment.

Although, some investors usually do the quick dumping thing so they can take profit and buy back at dips.