Why do you think so? With ICO you can get good coins for good price. For sure you need to know where to invest and how. This part is always tricky!
I think this depends on what your goals are and how to go about them. Quick profit? don't invest long, invest and short it immediately.
for long term investments, it takes more research of the company, vertical that it's in, the problem it's solving and it's product, etc.