TOKYO - Finance chiefs of the Group of Seven industrialized nations said Tuesday that digital payment services must be "appropriately supervised and regulated," raising concern as both public authorities and companies are studying the issuance of digital currencies.The warning comes as China's central bank has started trial payments using digital yuan in part of the country, a move that could mount a challenge to the international currency system based on the U.S. dollar, while Facebook Inc. has proposed its Libra stablecoin.In a joint statement released after their video conference, the G-…READ FULL ARTICLE
