You must be careful when choosing an ICO to invest to. I myself is a victim of ICO scam but I just lost a small amount to it. The information they give is not enough to judge that the ICO you are participating with is legit. You must dig more information on the ICO to ensure that it is a legit ICO.
With many it happens. Well, that was not a big sum. If you want to invest the next time, use the icodrops.com website. This site will greatly reduce your chances of getting on scammers.