https://www.reuters.com/article/us-usa-facebook-libra/facebook-vows-libra-currency-will-wait-for-approval-as-u-s-airs-worries-idUSKCN1UA1PF >Facebook Inc said on Monday it would not proceed with the launch of its Libra cryptocurrency until regulatory concerns are addressed, as the U.S. Treasury secretary took the unusual step on of saying he had serious concerns it could be used for illicit activity.