In the past few days, the day before yesterday I used 8531fusdt to buy 13.226 BNB at a purchase price of 645fusdt. Yesterday I sold it at 660, then last night around eight, I bought another 13.226 $BNB at the same price. Before going to bed, I set a sell order at 557, but I was surprised to see it at 745 when I woke up at five-thirty. I missed out on earning over a thousand U. Fortunately, I still have 199.33 BNB that I didn't plan to touch, so sticking to BNB is still the best strategy.