This headline is goofy. Central banks have been using digital electronic currencies for decades. The difference is that now they want to include all Swedes in the electronic currency system, not just Swedish banks, as they have been for decades. (And the claim that this uses "blockchain technology" is just a lie; it's a centralized database. It's no more a blockchain than Git is.)

I think this is a terrible idea given both the current appallingly bad state of unintended vulnerabilities in computer security and the appalling intended security vulnerabilities inherent in centralized architectures like the one they're proposing.