Which every financial institution and western government keeps trying to get rid of because it is essentially impossible to regulate or police?

And which cops have a nasty tendency to seize on sight in the US if seen in any significant quantity (outside of an armored car) because ‘proceeds of crime’?

And pretty much every drug transaction, illegal sexual transaction, whatever is done in cash? To the point most major crime shows and drama shows have scenes involving some massive pile or duffel bags or whatever of cash as a plot point?

Cash on the barrel head is the textbook definition of ‘difficult to regulate’.

Also, most people buying person to person used cars and doing yard sale transactions use it too, of course.

It’s not a requirement that Cash transactions involve a crime at all. Same with crypto.

If your transaction is illegal though, using Venmo seems pretty dumb.