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.
Mustn't all token will increase after ICO is end and they is listed on exchange site. Most of them will go down because all bounty hunters usually sell their token after they was received token.
Example: QuarkChain is a good project that judged very high by crypto community. When QuarkChain was listed on binance after ICO is end, the price of QuarkChain increased 15x and reach $0.31 but now the price is $0.08. If you did not sell QuarkChain at that time then now you will be very regret.