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? 
If that's the case try to consider the market status. Then, next is your reason of investing that ICO if you have done a good fundamental research and you are optimistic on it therefore its one of the reason for you to hodl. The others is on by work of the Team if they are suitable and what are the current works in progress they are doing.