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.
Yes, i agree. That is why we should optimize investment funds by diversification. Crypto is a potential market, but it is characterized by and uncontrolled ... it still carries certain risks. Therefore, being cautious with the ico / coins project in investment is a good method. Also, do not put all your money on a project / coin.