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Money Isnt Free, but Moving It Is Now Cheaper - WSJ

One day last year, at the height of the Ukrainian revolution, Mark Howard spotted something interesting on television. In the background, a protester was holding up a poster with an instantly recognizable logo: A B with two vertical bars, the symbol for the digital currency bitcoin.

Mr. Howard is an American IT specialist and a self-described bitcoin enthusiast. He surmised that the posters QR code, which is a kind of square bar code, must contain the address of a bitcoin wallet belonging to the protesters. On a whim,...

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