Aren't these big shots afraid when the return on investment shows a negative of over 1,000 U on the square? I have a principal of 350 U, and when I lose 10 U on a trade, I want to sell. If I lose more than 20 U, I need to spend a day or two to break even. I really don't dare to use high leverage; at most, I use 25 times. Even being this cautious, I still end up losing after a week. I can't even imagine how long it will take to break even after several losses of over 1,000 U. This kind of play can only be for institutions, right? Would an individual dare to operate like this?