The Facebook proposal to create a new cryptocurrency as part of its broader Libra project raises profound questions about national sovereignty, corporate power, consumer protection, competition policy, monetary policy, privacy and more. The U.S. regulatory system is not prepared to address these questions. Nor are the regulatory systems of other nations or international institutions. We call on Congress and regulators to impose a moratorium on Facebook’s Libra and related plans until the profound questions raised by the proposal are addressed.