Often people invest and they hope to make money quickly but not because they believe in the project, so its hard to argue them not to sell tokens
I've seen so many ICO projects after completing their ICOs start to talk about the whole moon talk, lambo talk but in terms of product they show us no substance. Any project's team that only wants to release news during an uptrend is clearly a pump & dump token. And sadly most of the ICO investors want to get involved with those projects because it is in those moments their dream of making quick bucks come true. But most of times their dreams get shattered.