Programmable or 'purpose-bound' money is coming, probably as a feature in central bank digital currencies

Governments may dictate where or when you use it, but it's not a gift card
Interview As the tide of enthusiasm for cryptocurrency ebbs, new forms of digital currency are emerging, including something called purpose bound money (PBM) – digibucks that can only be spent in certain ways coded into them by their issuers, or would only change hands under certain conditions.…