You have said it all, selling off will only make you loose at the end of the day. So why not hold now and if possible buy more altcoin and keep to sell when things get back to normal. I believe things will not forever be like this, the situation is just for a while and it won't last long before we start jubilating again. Hold and now sell.
It is very frustrating to see that the coins I am holding for a while now have their prices fluctuate. But I dont agree on selling it this time because I would experience more losses. I will just wait and hold these until the market calms down. Patience is needed during these difficult times in the cryptocurrency world.