In the futures and foreign exchange markets, it is true that the annual turnover is 20 times, but it is very, very small.
The rare reason is that it is difficult to have a good deal with heavy positions. Psychological technology is only the first barrier of trading, and the second barrier is psychological factor, which determines the result of trading. There is a book called Weird Psychology, which talks about many irrational phenomena in behavioral economics and also discusses the human nature behind many irrational psychology, including fear, greed and so on. Once fear and greed cannot be stopped, no matter which financial market you enter, you will become a big casino, and the final result will be fiasco and loss, without exception.