https://www.reuters.com/article/us-facebook-libra/ecbs-coeure-says-stablecoins-pose-risks-amid-resistance-to-facebooks-libra-idUSKBN1W11CZ >A new breed of asset-backed cryptocurrencies such as Facebook's Libra are untested and pose serious risks, the European Central Bank's Benoit Coeure said on Monday, pledging a tough regulatory approach.