I will often find out why the coin is dump. Evaluate the potential and strength of the project, to decide whether to keep it or sell it. And I often trade to cover the lost money. Get experience from losing money.
That is a good strategy as sometimes we keep our money in some projects which remain there at that price or continue to drop no matter how much better is the project but at that time we miss a coin or a project the price of which increases at that time so in that time if we transfer our money to there then we can recover our loses in that period.