Some ideas are to good to be kept secret

Just came across this article about the future of cash in Sweden. Clearly we need to preserve the cash in society to safeguard trade, in a scenario of blackout. If you just quickly think about how dependent any e payment solution is of such things as authentication, electricity, data-communication etc it becomes clear that cash has a role to play. Interesting players to monitor includes Klarna, iZettle as well as a few smaller players listed on the Stockholm Exchange.