Scammers are becoming more sophisticated. No matter how carefully we check, it is possible to be cheated by them. And the current market is really bad. So investing in ICO at this time is really not wise at all
If you do proper research, it is possible to identify the scam project and good project. You need to research carefully. Some people have already suggested a lot of ways to find a scam or good project. Read those all, try and you will end up finding out a project's legitimacy.