I would like to ask you what is the key criteria for you when you decide to buy an altcoin? Graphic analyze, project quality, news or any other thing?
You have to look at different aspects. Most established coins in the market have good teams behind and a road map that tells you where they want to go. That would tell you that that coins will stay and will be profitable. Even icos. If it looks fishy try checking their sites if they have detailed plans