Sweden was doing it for donkeys even before a Chinese scientist decided to fuck about with science, then leak it from his lab and create a 'demic.
I see no harm in it really, a lot more convenient than taking piles of cash around.
Someone I used to work with in 2002, got assaulted by a bunch of yobs because they knew he used to carry loads of cash with him. They robbed him of his money and not long after that died of an epileptic fit, possibly caused by the beating.
If we lived in a cashless society back then, I doubt he would have even had that much money on him to be targeted, so would have still been alive today or lived longer.