The government wants to create a new blockchain that they control. That’s all the CDBC (Central Bank Digital Currency) is. Why would you ever use it?
https://www.cnbc.com/2020/10/09/central-banks-lay-out-a-framework-for-digital-currencies.html
https://www.marketwatch.com/story/central-bank-digital-currencies-would-increase-governments-grip-on-money-with-few-benefits-for-the-rest-of-us-2020-06-17