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? 
For such ICOs, I think the opportunity for prices to return is quite difficult. If I have such a case, I think I should sell to earn a certain amount of money that I can get, or if I still have someone who wants to buy the crypto. If his loss is more than 75% of his investment then it's better to gamble and hodl. If his loss is less than 50% then he should sell and save at least some of the money.