The craze for cryptocurrency can be explained by a host of factors: the allure of getting rich quick; the attraction of off-the-grid accountancy for malefactors like tax evaders and drug dealers (though Bitcoin is traceable); the glamour of the new. Despite blockchain currencies’ wild volatility thus far, I’d still posit that the more underlying attraction is to a reliable store of value. Bitcoin investors may not recognise their motivation as such, but the impulse behind computer-generated currency is revolutionary: to take the production and control of money away from government.