https://www.reuters.com/article/us-facebook-libra-ecb/facebooks-libra-will-be-disruptive-coeure-idUSKBN1W226N >Digital currencies such as Facebook's Libra digital coin will disrupt the financial system by either forcing central banks to innovate or because states will cede a key role to a new global player, ECB board member Benoit Coeure said on Tuesday.