The regulation of Bitcoin and other cryptocurrencies in the United States has been a convoluted and ever-changing issue. With various federal and state agencies taking differing approaches to regulate the industry, it has resulted in a jumble of rules and requirements. At the federal level, the Financial Crimes Enforcement Network (FinCEN), a bureau of the U.S. Department of the Treasury, has been the primary regulator of cryptocurrencies. Back in 2013, FinCEN issued guidance stating that vir...