Reading passage
In October 2008, a person or group using the name Satoshi Nakamoto published a nine-page paper proposing a system for electronic cash that would operate without banks. The system, called Bitcoin, was launched in January 2009, and it introduced a novel solution to the double spending problem: every transaction was recorded on a public ledger called a blockchain, maintained collectively by a network of computers. Within little more than a decade, what began as an obscure experiment among cryptography enthusiasts had grown into a global asset class valued at more than one trillion dollars at its peak, forcing economists, regulators, and central banks to reconsider what money is and who should control it.
Supporters argue that the core innovation of cryptocurrency is not the coins themselves but the blockchain that records them. Because the ledger is distributed across thousands of independent computers, no single institution can alter the transaction history or freeze an account. This property, known as censorship resistance, has obvious appeal in countries where citizens distrust their banks or governments. In addition, cross-border transfers that once took days and cost seven percent in fees can, in principle, be settled in minutes for a fraction of the cost. Advocates therefore see cryptocurrencies less as speculative toys than as a parallel financial system that offers inclusion to the estimated 1.4 billion adults worldwide who lack access to a bank account.
Critics, however, point to a fundamental contradiction. Money performs three classic functions: it is a medium of exchange, a unit of account, and a store of value. Cryptocurrencies such as Bitcoin struggle with all three. Prices can swing by twenty percent in a single day, which makes them useless for quoting the price of bread or calculating wages. Transaction capacity is also severely limited: the Bitcoin network processes roughly seven transactions per second, compared with tens of thousands handled by a conventional card network. The economist Nouriel Roubini has famously dismissed cryptocurrencies as the mother of all bubbles, while others note that most holders treat them as speculative assets to be hoarded, not as money to be spent.
Environmental concerns add a further layer of criticism. Bitcoin is secured by a process called proof of work, in which computers race to solve mathematical puzzles, consuming electricity on a scale comparable to a mid-sized country. A 2021 study by the University of Cambridge estimated the network's annual consumption at roughly 120 terawatt-hours, more than that of Argentina. Although some mining operations use surplus hydroelectric or otherwise stranded energy, the carbon footprint of the sector has become a serious obstacle to its social acceptance, and several newer cryptocurrencies have adopted a far less energy-intensive mechanism called proof of stake, cutting electricity use by more than 99 percent.
Governments have responded in strikingly different ways. El Salvador adopted Bitcoin as legal tender in September 2021, a decision that the International Monetary Fund warned could threaten financial stability; surveys a year later suggested that fewer than twenty percent of the population used the state-issued digital wallet regularly. China took the opposite route, banning cryptocurrency trading and mining outright in 2021 while accelerating work on its own central bank digital currency, the digital yuan. Between these poles, the European Union has opted for comprehensive regulation, passing the Markets in Crypto-Assets framework in 2023, which requires exchanges to be licensed and stablecoin issuers to hold adequate reserves.
The rise of central bank digital currencies, or CBDCs, is perhaps the most consequential reaction of all. According to the Bank for International Settlements, over ninety percent of central banks are now exploring the idea of a digital version of their national currency. Proponents claim CBDCs could deliver the technological benefits of cryptocurrencies, such as instant settlement and programmable payments, without sacrificing monetary control or price stability. Yet civil libertarians warn that a fully traceable digital currency could give states an unprecedented window into the spending habits of their citizens, and might allow governments to programme restrictions, such as expiry dates, directly into money.
Whether decentralised cryptocurrencies will endure as everyday money remains uncertain. What is already clear is that they have permanently altered the terms of the monetary debate. Financial institutions that once dismissed Bitcoin now offer custody services for it, and the underlying ledger technology is being adapted for purposes ranging from trade finance to the tracking of charitable donations. In this sense, the true legacy of the cryptocurrency experiment may not be the creation of a new form of money, but the demonstration that the design of money itself is a political choice rather than a technological inevitability.