better sell at 15% red than holding till 100% red
It seems you are lack of knowledge in crypto currency because if you were an expert you never said that by the way you should learn all those rules that in crypto its not possible to see 100 percent red and holding has always been so beneficial I have never seen people complaining for holding because it takes time to make everything fine so i am holding only.
I thought maybe, because many shit coins fell and died? the point depends on the market conditions of the coins that you buy,
if there is no chance to go up, then it's better to sell when there is a chance maybe %15 that's not a big loss