I check these parameters before investing:
1- Marketcap and total/current token issue
2- History(Its not good to buy a coin which already pumped)
3- Team: A few people whose has good career must be in the team
4- Partnership
5- Coin type: ERC-20, NEP5 or independent
6- Which exchanges it's listed already
7- Telegram channel: If telegram channel too active that means there are some strong hands
