Absolutely right you have to make research , check who behind the project and the company details before you make decision to invest your money , but remember never put all your eggs in one basket .
in fact, you very correctly said that we should have at least 10 coins in our portfolio. Thus, if we disperse our investments into several projects, then this minimizes our risks. In addition, I am sure that even with a more thorough study of information about projects, there is still no guarantee that your investments will make a profit.