Don't Give Up Your Cryptocurrency

"We're going to get ourselves to a point where the money is digital. We can fight it," he says. "But just be careful, because it's luring you in to this and getting you into a situation where you feel that there's no way around it." The idea behind some of the other central bank digital currencies has been 'disastrous', writes Youneli. But if you've got yourself a central bank digital currency that is programmable, you can make the money do all kinds of things - including setting it to expire. And so again, digital currencies are not by default evil.