The bottom you think is just what the dealer wants you to see, like Dogecoin for example, it has been consolidating at 0.4 for so long that everyone thinks it's the bottom, and then they all start going long.
In fact, the cost for the dealer may be only 0.1, and when it was at 0.4, it had already tripled. Then they slowly offload their stock, making you think that this position is a strong support level, that it can't possibly drop. When the price reaches 0.3, retail investors will double down even more, while the dealer continues to offload. By this time, the dealer is still making a profit, while retail investors rush to buy.
Just when you think you’re about to make money, it will drop again. When the price hits 0.2, those who entered contracts must have faced liquidation, going from 0.4 to 0.2 even with the lowest leverage of 2 times, they probably got cleaned out almost completely.
At this time, the dealer can continue to let the price drop, but they will decide based on the situation whether or not to let it fall. If they choose not to drop it, the dealer will then enter the market and pull the price back up, making a profit without losing a single cent!