Ch. 1. The Digital Transformation.- Ch. 2. Technology Underlying Cryptocurrencies and Types of Cryptocurrencies.- Ch. 3. Legal Issues of Digital Technology.- Ch. 4. Legal Issues of Digital Technology.- Ch. 5. States' Regulation of Virtual Currencies.- Ch. 6. Criminal Prosecutions and Civil Litigation Concerning Virtual Currencies.- Ch. 7. Crowdfunding and the Taxation of Virtual Currencies- Ch. 8. International Regulation.- Chapter 9. Conclusion: The Future of Cryptocurrencies.