Odaily Planet Daily News: German Central Bank President Joachim Nagel said in a speech in Rome that it is not clear what the upper limit of consumers' holdings of potential digital euros should be. Nagel cited research by ECB economists, pointing out that holding 3,000 digital euros per person may effectively curb the impact on bank liquidity risks, but the latest research by the German Central Bank shows that the optimal number may be between 1,500 and 2,500 digital euros per person. He said that he would study carefully to determine the best value for this upper limit. (Bloomberg)