If you are juggling that kind of cash, I would insist on two things:

- Background checks. Check the backgrounds of the team to heaven and back. Not just to check for scammers, but also to check for teams with good intentions but insufficient skills.
- Ask how the project expects to make money. You can't just hope for the price of the token to rise on the exchanges because of hype. Does the project have associated value with the tokens, like a product or service? If it does, can the project justify the use of cryptocurrency to access its product or service?

With respect to the background, don't just check Linkedin. Check Crunchbase, gust, angel.co to see if the leaders have had success in the past with startups and such. Dig deep. If they have listed companies they founded, make sure they companies exist.