The crypto market once again ushered in a wave of slump. In the midday of December 4, market data showed that the price of Bitcoin fell below US$42,000 for a short period of time, with a 24-hour drop of more than 20%, reaching a minimum of US$41967. Ethereum fell below US$3,500, a 24-hour drop of more than 21%. In the past 1 hour, the contract market has liquidated a total of US$1.13 billion on the entire network and a 24-hour liquidation of US$2.23 billion. After entering December, the crypt...