1. Does the company solve a real-world problem?
2. Does the company has white paper, roadmap and a team on their website?
3. Does the company has a good track record of meeting their deadlines?
4. Does the company stand out amongst its competitors in solving the world problem they've identified?
5. Does the company has products?
6. Does their coin has a low total/circulating supply and has a low market cap?
7. Does the company have a lot/good followers on facebook and twitter?
8. Follow your instincts!
Conclusion:
Research first the company or coin you want to invest in. Don't follow the hype and avoid FOMO (fear of missing out) & FUD (fear uncertainty doubt). Invest only what you can afford to lose as cryptocurrency investing has no guaranteed that it can make you profit.
Long Live Cryptocurrency!
HODL!