In January 2018, I poured all the 200000 yuan I won in Texas into the cryptocurrency market and lost half of it in less than two months. In May 2021, I withdrew 10 million from the cryptocurrency market with the intention of buying China Ping An Pension, but ended up losing another 2 million in a few months. After experiencing these two times, I deeply understand that the money you earn in industry A, even if there is a great similarity between industry B and A, cannot be understood and familiarized with industry B in the short term. So, even though it has been a year, I have only invested 10% -15% of my funds in the US stock market this time. Many of my friends around me have suffered greatly. In fact, there used to be very familiar examples in the cryptocurrency circle. Many friends who made money by playing meme on the chain believed in the ghost stories of BTC, used the money earned by playing meme to cheat BTC, and then suffered a wave of heavy losses. There have been both 21 and 26 years.