That's why you have to be extremely careful when selecting the coins you will purchase from any ICO. I have had mixed luck with them but for the most part they seem to generally devalue as soon as they hit the exchanges. Need constant good news and progress to keep them rising which most teams seem unable to deliver. I did have good return from Red Pulse which i bought in an ICO but the window of opportunity was small and it took months before i was able to get a decent return from it. CTR (centra) was a total disaster for me with the project being closed down by SEC in the end.