President Asterisk has the Fed announce that all forms of crypto except FEDCOIN(tm) are now illegal to use or conduct purchases with.

Oh, by the way, cash is also outlawed. So is Gold and Silver as a form of currency, and both are delisted on any US-approved exchange ( /Franklin Roosevelt's Ghost enters the chat )

You're using FEDCOIN (FCN) from now on. For the first 90 days, your money will be exchanges at a $1USD - 1FCN ratio. Days 91-180 is a $1 - 0.5 FCN ratio. Starting Day 181, USD becomes worthless and un-honored as a form of US currency.

Oh, don't worry about doing all the computer stuff - the banks will do it for you and handle it on your credit/debit cards and NFP devices. Payment processors will similarly handle FCN like any other form of money, eventually fading out USD handling at the 6-month mark, as scheduled.

Bonus - if you make less than 400k in FCN a yr, you don't have to file taxes anymore - we'll just do that for you, unless you're a corporation, run a non-profit, or are a special-status citizen (where all the loopholes come into play).

In special partnership with all major payment processors, all of your financial transactions will now be trackable. If your spending habits show any unusual changes or anomalies, expect a knock on the door by the feds.