This textbook examines the legal and regulatory approaches to digital assets and related technology taken by United States regulators. As cryptoassets and other blockchain applications mature, and regulatory authorities work hard to keep pace, Daniel Stabile, Kimberly Prior and Andrew Hinkes invite students to consider the legal approaches, challenges and tension points inherent in regulating these new products and systems. The authors explore the attempts to apply securities laws and money transmission regulation, the growth of smart contracts, the taxation of digital assets, and the intersection of digital assets and criminal law. This innovative and unique textbook features: Commentary and analysis by three leading attorneys engaged with the regulation of digital assets and blockchain technology, offering practical, real-world acumen A comprehensive overview of the origins, key features and mechanisms of blockchain technology, as well as a broad intimation of the divisive debates that will shape the future of digital assets, to guarantee a thorough introduction to the topic for students Excerpts of authorities and other materials from key regulators, including the Financial Crimes Enforcement Network, the Securities and Exchange Commission, the Commodities Futures Trade Commission, and the Internal Revenue Service, to add insight and nuance to classroom discussions. In this, the first textbook of its kind, students of law, business, or technology will find crucial insights into the law and regulation of blockchain and a comprehensive overview of significant public debates on the topic.