On November 12, at the "Financial Conference: 2020 Forecast and Strategy", He Gang, editor-in-chief of Caijing magazine, asked Alan Greenspan, former chairman of the Federal Reserve Board, "What do you think of the central bank issuing digital currency?" Reserve Committee Chairman Alan Greenspan replied: The global central bank knows how the market is going to flow and how the monetary system works. The central bank's greatest ability is to be a good predictor and predict where the economy will go. For digital currency, money supports the sovereignty of the country. No other institution has such power. The most basic sovereignty of the United States is not Facebook's reach. Whether to issue digital currency is a political issue, not an economic issue.