There are no Bitcoin “accounts”. There is no identity attached that can be followed backward. It only goes forward because of the way the encryption works.
The transactions are what is kept track of, by everyone. Everyone has a copy of the “ledger”.
OK, it’s like finding a dollar bill on the street. I have no way of knowing where it came from (backward), but I can spend it wherever dollars are accepted (forward) without leaving any audit trail. Right? Sounds a lot like a cash transaction.
Thanks, but for right now I’ll trade in dollars, not bitcoins. Possession is 9/10 of the law where I came from.