When Bitcoin Grows UpJohn LanchesterIt’s impossible to discuss new developments in money without thinking for a moment about what money is. The best place to start thinking about that is with money itself. Consider the UK’s most common paper money, the English five or ten or twenty quid note. On one side we have a famous dead person: Elizabeth Fry or Charles Darwin or Adam Smith, depending on whether it’s a five or ten or twenty. On the other we have a picture of the queen, and just above that the words ‘I promise to pay the bearer on demand the sum of’, and then the value of the note, and the signature of the cashier of the Bank of England.

Source: John Lanchester · When Bitcoin Grows Up: What is Money? · LRB 21 April 2016