Which Coin we should buy in crypto market?

If you are a crypto investor, check the following for your coin :

1. it’s having proper white paper ?
2. project having proper team ? Or it’s having one or two developer and many advisors ( if so leave this coin )?
3. Development started ? Beta version available in market or not ?
4. Roadmap ?
5. Sector : which area coin project cover . If it’s having only smart contract then why this project is good/best among other smart contract based project.
6. Pre mined coins or mining required ?
7. The project is actually required the Coin or project is independent of coin.
8. Follow the project in medium/Twitter/Facebook/slack/Reddit/discord etc.
9. Do your own research ( instead of asking anyone), because loss/profit will yours.