Decades is within our lifetime for most of us, this change is accelerating quicker in some countries than others (I suspect the US is behind in this respect). S

Decades is within our lifetime for most of us, this change is accelerating quicker in some countries than others (I suspect the US is behind in this respect). Some countries in Europe are actively considering phasing out cash in the decades to come. Hoarding physical currency for a sense of control is misguided; someone else controls the value of that physical money too, and there is a policy of inflation. It really is no different to digital currency in terms of control over value. Buy gold or land if you want to hoard (which each have their own problems), and use barter if you want to escape detection.