China's digital Yuan has some similar properties to Ecash. You have horizontal privacy (you can spend your money without your partners knowing how much you have

China's digital Yuan has some similar properties to Ecash. You have horizontal privacy (you can spend your money without your partners knowing how much you have or what you do with it), but not vertical privacy (the government gets to know _everything_). They're even working on extending it to support offline transactions. This is a scary thing to put into any government's hands, let alone the Chinese government's, but it has enough attractive properties that it has a good chance of catching on.