Give me a fulcrum, and I can move the earth. I've heard of it. The principle of lever is to use small to lift big. If the lever is 1: 10. That is to say, if you only have 10 yuan, but you can buy and sell something with 100 yuan through the leverage mechanism, if you buy this thing with 100 yuan, you will earn 10 yuan, which is equivalent to doubling the principal. If you lose 65,438+00%,