The biggest obstacle to a European Central Bank-issued digital currency is not the technology, according to departing European Central Bank President Mario Draghi. Rather, he said, the “key issue is … its utility in terms of costs and benefits to the public.”

Mario Draghi, President, European Central Bank, Frankfurt during the special address session at the Annual Meeting 2013 of the World Economic Forum in Davos, Switzerland, January 25, 2013. . . Copyright by World Economic Forum. (via Wiki commons, swiss-image.ch/Photo Remy) Steinegger