True story, a friend of mine started to get involved in the cryptocurrency world in 2019. At the end of October, he used all his savings from more than a year of work to buy the mainstream coin ETH. The price of one coin was about 700 to 800 yuan, less than 1,000 yuan. At that time, BTC was about 30,000 yuan, which was unaffordable. He thought that this investment would not see hope for three to five years. Unexpectedly, the cryptocurrency world began to rise sharply in 2020. During the Chinese New Year, I saw a lot of news reporting on the cryptocurrency world. I opened it and was very excited.