To invest to a serious ICO project, you should do accurate research about it.
Read a white paper, check team members, web site, all social media platforms, ask for a smart contract at github.
You can recognize scam,when he/she will get your private information about your account.And there's a lot of way that a scammer can do.But for me you must be wise especially in this world full of a wise people.We could be recognize when he/she ask for something thats different from your personal info.And also we see how can trust a person.Just make sure that be sure who will be the one we trust for everything.