BTC pulled up for three days, and the profit was half recovered. I also wondered why I didn't sell at the highest point last month. Later I figured it out. The market started to rise at the end of October last year. At that time, I kept wanting to sell but I resisted, so I could get the big profit at the end of March. If I had sold in the middle, I could only watch the price of the currency continue to rise and miss a large round of gains.

Except for the main force, no one dares to guarantee that they can sell high and buy low every time.