I think it depends on your condition. If you already bought coins and dumps happen. Better strategies are not waiting for the price to fall lower. To sell your coins even if you lose money. The next step is to wait for the lowest price and you should be ready to re-buy the coins again. Because with the situation now the currency price can suddenly rise rapidly after the dump occurs. And this becomes our best opportunity to get profit.

It may be hard to do but I've experienced such a thing. Experiencing losses in cryptocurrency trading I think it makes sense. But we also often benefit from crypto-currency trading.