It happened during the last winter pump. I usually sold 60-70 percent of these coins and waited for the price to decrease or just bought another perspective coins. Another 30-40 percent, were still on my account with a hope for another big pump. I think it is a good strategy, if you are looking for fast profits. If you are a long term investor and you believe in this coin, just left the whole balance and chill until you will get 2000% profit.