of course a good investor will first do its own research (whitepaper, roadmap and etc), besides that what is your biggest motivation?
You already mentioned what is need to be known, so no need to be asking whats our biggest motivation because everything needs to be checked 100% to be sure that what youre going for wouldnt turn out to be something else in future. You shouldnt just check 50% and leave the rest, if you do that you would be taking a huge risk. So check everything from A to Z to be sure that your money is safe