Of course we have to be careful, before you invest make a research about the coin don't be hundred percent confident because there's alot of scam coins out there.
it is mandatory to study the crypto market before investing into it. You can make good profits from your investment if you have knowledge about crypto market.
You should observe the market on daily basis. Give as much time as you can, and try to understand the coming market situation to take your decisions on the right time. By affective cryptocurrency trading you can make huge money in less time.