Have you seen through it? The big players first dump the market, then altcoins follow suit and decline. When the time is right, the big players reverse and push the market up, and those retail investors and small coins that followed suit will naturally take off. This is the operational pattern of this market. To survive in crypto trading, you must accept that such price fluctuations are normal—it's not a bug, but a feature of the game itself. Without proper mental preparation, you really can't play this game.