Thats is the risk but also the opportunity. Some coins gets pumped with 50/100% in no time, sometimes with 20% in matter of minutes. I follow the super short trading method, ie in a trade for minutes, ride the smallest upward waves. So far so good, mostly some plusses....even when the coins go the other way, then buy more and wait until the hit breakeven or above. But cost a lot of time, but de-risks the trading, from some educated guesses instead of pure gambling.