Anyone who has experience in the B circle knows that it's easy to buy at the bottom but difficult to sell at the top. This is because the bottom consolidates for a long time, giving you ample time to react, and you are likely able to buy in the bottom area. The difficulty in selling at the top lies in the fact that the time cycle is not very long. At the end of a bull market, when every coin is rising sharply, you hesitate to sell, always wanting to earn a little more. If you are greedy and hesitate for a few more days, your account will soon face a sharp decline.