In a brochure with the title If Crisis or War Comes that will be sent to every home in Sweden next month, the defence ministry advises people to use cash regularly and keep at least a week’s supply in various denominations as well as access to other forms of payment such as bank cards and digital payment services. “If you can pay in several different ways, you strengthen your preparedness,” it says.
If only there were another way to pay that would fit this very purpose ;)