You must research the coin, the team behind it and their white paper.You must know if the developer is active and ofcourse you need to know the roadmap. Do not invest in shitcoins unless your ready to gamble your fortune.Invest on the coin/token which have a good performance and high market capital. Its good also to have a target hold of coins instead of trading daily because of high risk of losing money.Just invest and hold it for longterm. Invest on a good coin which is already have a good background and you can relax all the time and dont stress your self.