1. When you want to invest first of all research about the particular ico you want to invest in, try to check their Whitepaper because some ICO copy text from another ICO white papers
2. Try to check their LinkedIn profile though that does'nt matter because some fake LinkedIn profile.
3.Try to know their real location even though some use VPN to hide their location.
4.website professional matters a lot because some don't even know how to build website and they are claiming that they are in to Blockchain
5. Despite all this..involving in ICO is a big risk
it's like you give us instructions as a child, funny and silly
but maybe a little help for beginners. I think that what investors should have done, especially in short practical investments, is where the mistake lies. there are many new investors who want to get rich in one night