Feature: Greece's bitcoin community grows amid warnings about crypto currencies risks

Photo taken on Feb. 25, 2018 shows a coffee shop where customers can pay by bitcoin in the center of Athens, Greece. Greece's bitcoin community grows in recent years, buoyed by the capital controls imposed on the traditional banking system since the summer of 2015, users and investors told Xinhua, although local authorities warn about the risks of crypto currencies. (Xinhua/Lefteris Partsalis).