What if one has to think to become a criminal some day?
It is always possible that one has to flee or evade from here to there for whatever reason. Insofar as there are payment methods that are accepted by many people, even if one is completely without an electronic device, something like going underground or fleeing is possible.
It becomes difficult when such alternatives are not available. Then it seems to me that one is dependent, for better or worse, on means that one cannot wear on one's own body without these means being able to betray one at the same time. Just a thought. My parents were refugees and prisoners, so it sometimes occurs to me that I could possibly have a similar fate. What could replace cash?