Auguries of bad things
Does anyone here suppose that Vlad the Emailer and his little coterie of crooks does not have a three-ring binder contingency plan and gigbytes of code ready to wreak havoc in western banking systems if and when the urge takes them?
Try to imagine the disruption and chaos if all payment methods get screwed for say, just one week.
Then imagine that happpening in a cashless society.
Just because we can*¹ go cashless doesn't mean we should.
*¹ Yes, I know governments love the idea, because it gives them even more control and surveillance of citizens: but governments, I would remind you, are monumentally stupid and short-sighted and run by a self-selecting sample of the worst characters the country can spawn. Not a good place to look for your best interests.