A Bit of a Do

You walk into a bar, order a pint, scan a QR code and sit down. This is not only the beginning of a tedious joke but also how you pay for booze with Bitcoins.

But did you really pay for that pint? What on earth is a Bitcoin? As you sip the spumous ale, consider what normally occurs: you’d hand over a sheet of paper, you’d get a handful of metal discs back. You’d sit down as if nothing was weird about that transaction.
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