What legal regulations apply to cryptocurrencies?

The legal regulations that apply to cryptocurrencies depend on the country in which they are used. In some countries, such as the United States, cryptocurrency is regulated by the Securities and Exchange Commission (SEC), the Financial Crimes Enforcement Network (FinCEN), and the Commodity Futures Trading Commission (CFTC). Other countries, such as China, have more restrictive regulations, banning certain activities related to cryptocurrency.