The way that money works now is a blip. It's a temporary institutional arrangement agreed in response to specific political, technological and economic circumstances. As these circumstances change, so money must change. Many people think that it will undergo a pretty significant change in the very near future and we need to start planning for the coming era of digital currency. The historian Niall Ferguson wrote in 2019 that if America is smart, it will wake up and start competing for dominance in digital payments. Competing for this new currency dominance could mean a new cold war in cyberspace with, for example, Facebook's private currency facing off against China's public currency facing off against a digital euro. Or would a digital dollar win this new space race? This is not just the concern of wide-eyed technologists obsessed with Bitcoin. In a 2019 speech the governor of the Bank of England said that a form of global digital currency could be the answer to the destabilising dominance of the US dollar in today's global monetary system. But which digital currency? Will we really be choosing between the Federal Reserve and Microsoft (between dollar bills and Bill's dollars)? Or between Facebook's Libra and the Chinese Digital Currency/Electronic Payment system DC/EP? Between spendable SDRs and Kardashian Kash? It would be a mistake to see this as a technical debate about cryptocurrencies and blockchains, about hash rates and key lengths. It matters far beyond the virtual boundaries of the new age. The dollar's dominance gives America the ability to exert soft power through the International Monetary and Financial System. A serious implication of replacing existing monetary arrangements with new infrastructure based on digital currency is that this power might be constrained. How might America respond to losing its hegemony? Now that the technologists, the business strategists, the economists and the national and international regulators are beginning to glance in the direction of these alternatives, the whole topic of digital currency needs to be explored. In this book, industry expert David Birch sets out the economic and technological imperatives, discusses the potential impact, and highlights a series of tensions-between public and private and, most importantly, between East and West-to contribute to the high-level debate that we must have to begin to shape the International Monetary and Financial System financial system of the near future.