https://www.reuters.com/article/us-cenbanks-digital-explainer/explainer-an-e-yuan-euro-or-dollar-central-banks-get-to-grips-with-digital-cash-idUSKBN2CE1SP

The world's biggest central banks are revving up work on issuing digital cash, aiming to fend off emerging threats to traditional money and to make payments systems smoother.