Book excerpt: The world of cryptocurrencies and blockchains was initially viewed as a niche space of little interest to mainstream business and finance sectors. With major banks now licensed to provide cryptocurrency custody solutions, and everyone from Facebook to governments using the underlying technology to create their own digital currencies, this has undoubtedly changed. The Cryptocurrency Revolution explains the most important takeaways from the continued growth of digital currencies and blockchain technology and explores the transformative possibilities of borderless payments, decentralized finance ('DeFi') and machine-to-machine transactions. Written in jargon-free and accessible language, this book examines the key value proposition of Bitcoin and other cryptocurrencies and how decentralized technologies could enable banks and financial institutions to become more efficient. It looks at the potential impact of company-backed virtual currencies (such as Facebook's Libra) and how governments and regulators around the world are reacting to these innovations. With discussion of the principles of tokenomics and the difference between public and private blockchains, The Cryptocurrency Revolution is the essential guide for those wishing to understand the threats and opportunities of the changing world of payments and finance.