My funds are not subject to forfeiture (at least not yet) as they are legally earned and any taxes due, already taken.
I can go and spend cash pretty much where and when I please without anyone looking over my shoulder. Although for a long while there have been limits on how much. And no, I am not talking about criminally.
That won't be the case with your cashless society, which is all about control.
To be clear, I am not against having digital banking alongside cash. Just a total cashless society controlled by governments.