In the blockchain and digital currency industries, the United States has always been the "vane" of global regulation. However, just as we are about to enter 2020, the United States still does not seem to give a clearer direction for cryptocurrency supervision, except for the lack of clarity. Outside the regulatory framework, many crypto market participants remain concerned that regulators will take enforcement actions from time to time. However, the US Securities and Exchange Commission (SEC), the US Commodity Futures Trading Commission (CFTC), and the US Congress issued guidelines in 2019 that also provide a roadmap for the development of blockchain and digital currency regulations in 2020.