Cash in the United States is not as private as it seems. Eventually the bills will be scanned at various points through the financial system and the serial numbers are logged by these authorities. It may take some time to collect the data versus being able to view a blockchain, but cash isn’t as anonymous as it appears. And with a vastly decreasing amount of cash in circulation, it makes it a lot easier for the Govt to track its usage. It’s still the best option even considering cryptocurrencies.

Another reason for the decline in cash is that as the U.S. debt increases, the economy will have to inflate along with it, and it’s much easier to manage increasing inflation in an economy without physical currency. If things get really bad and conditions exist that would cause a bank run, well, good luck doing that if you can’t have cash. Run off with a copy of the database or something.

Maybe they realized that most of Reddit is like Moltbook