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.
I have been there too and I have regretted on how I earn pennies by selling immediately my reward coins/token after receiving. But still it depends upon the project, some project are better sold while there's still value because as I have seen, many does not make it in the long run and just die.