I joined an ico in january 2018 and it was a bad ico. The price of this ico is 1/6 of the ico price and i lost about 3000$ if i sell now. Someone can tell me what should i do? Sell or countinue Holding? 
To give you advice you need to know what kind of ICO you are talking about. Several details are important: collected the project hardcap, there is a working product in the project, how does the team behave? On the basis of these data, we can give an objective answer.