There is a trend with most (not all but most) ICO. Price drops after ICO from people selling and then goes back up in a couple of days or weeks if its a good project. So people who are trying to make a quick buck is happy and people who are HODL are also happy.
Probably because almost every bounty hunter is running to sell tokens and price drops because of that?
I don't see any other reason, I don't think investors will rush to sell tokens ASAP for lower price and lose money.