I would suggest you to sell in case you can see another fine investment option to regain the loss. Yet my experience ended up being a loss in general. I bought LGD and then it went down a lot, I sold and bought doge but it also went down. Then I bought NEO but it didn't change the situation. Recently I bought stratis and it gave me 30% profit already, so I hope I will regain my initial investment eventually, but it's not that easy to do. I would suggest buying Waves, the price is rather low right now and expectations of people about this coin and platform are high.