Lets say that someone is you. Now what you will do depends on YOU. You bought when the price was high. You did that because you were expecting it to go even higher. So if you invested money that you could afford to lose, then keep holding till you have reached your profit goal. If you have invested money that you can't lose, then cut your losses short. Exit with whatever you have. You shouldn't have invested in the first place. And now if you can afford to lose, but you see that other coins might give you better opportunity, then swap your coins to those coins. You don't have to keep holding.