Presentation made on November 26th 2019 at TRUSTECH by Professor Dominique Guégan - University of Paris I, Pantheon-Sorbonne and Mr. Louis Abraham -Ecole Polytechnique (France) and ETH Zurich Contents: Libra was presented as a cryptocurrency on June 18, 2019 by Facebook. On the same day, Facebook announced plans for Calibra, a subsidiary in charge of the development of an electronic wallet and financial services. In view of the primary risk of sovereignty posed by the creation of Libra, regulators and Central Banks quickly took very clear positions against the project and addressed a lot of questions focusing on regulation aspects and national sovereignty. We address a set of questions that are part of the cryptocurrency environment and blockchain technology that supports the Libra project, describing the governance of the project based on two levels, one for the Association and the other for the Libra Blockchain, and identifying the main risks, considering at the same time political risks, financial risks, economical risks, technological risks and ethical risks. The future of this project is discussed through the emergence of Central Bank Digital Currencies.