Bitcoin, the original cryptocurrency, was launched in 2009. Today, there are thousands of cryptocurrencies with a total value of about $2 trillion. The surge in their prices earlier this year minted tens of thousands of cryptocurrency millionaires—at least on paper. Cryptocurrencies might turn out to be a massive speculative bubble that ends up hurting many naive investors. Indeed, many cryptocurrency fortunes have already evaporated with the recent plunge in prices. But whatever their ultimate fate, the ingenious technological innovations underpinning them will transform the nature of money and finance.

Myth No. 1

A cryptocurrency is real money that can be used for payments.

Cryptocurrencies such as bitcoin and Ethereum were designed as a way to make payments without relying on traditional modes such as currency notes, debit cards, credit cards or checks. The bitcoin white paper, which set off the cryptocurrency revolution, envisions an…

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