As a Bounty hunter I once made a mistake by selling tokens from Bounty that I received in a small market for $ 250. After 20 days the price of tokens that I sell is worth $ 1200. So the conclusion if you want to wait you will get maximum results. Believe every ICO project will prepare a good market in the future.
Not all tokens will rise if we hodl for some time. Most token prices will fall when ICO finishes, but you need to do an analysis of the token whether it can increase again or not. If you think the token can increase again, then holding it is the best.