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Some smaller exchanges including ProBit, Cashierest and Flybit have already said they will end won trading, and that they will continue operations involving only digital coin trading until securing partnerships with banks.

Smaller operator Probit removed 145 coins all at once in June, sparking concern among investors that more coins could be removed as the September deadline approaches.

Including standard demographics, such as rage, age, income, children, population density of resident, etc., in a Probit model improves prediction modestly – individual predicted probabilities of subscribing range from 6% to 30%.

There are evangelicals: the analysts at the richest clubs and the academics who use tools such as "minute-by-minute bivariate probit analysis" that send you dizzy just thinking about them.

One of the authors, Dr Babatunde Buraimo – a senior lecturer in sports economics at the University of Central Lancashire – talks me through the "sophisticated statistical model" involving "minute-by-minute bivariate probit analysis".