Cryptocurrencies: The great hiccup

Bitcoin is growing too fast for its technology to keep up.

IN MOST businesses, a small coding error is a minor problem. With Bitcoin, an online "cryptocurrency", a fairly simple flaw seems to have cost $5.3 billion. That is how much the value of all of the Bitcoin in the world has fallen over the past two weeks, after a bug caused several Bitcoin exchanges to halt withdrawals temporarily.

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