To listen to some of the predictions about the future of the cannabis industry, you would think financial analysts had been partaking heavily of the product. The European cannabis market will be worth €123bn (£106bn) by 2028, according to the London-based analysis firm Prohibition Partners. That is more than twice the revenues that Apple reported in the region last year and larger than the annual economic output of Ukraine. A flood of established stockbrokers have begun pumping out research on the industry and, as of the beginning of 2018, there were already a dozen cannabis companies with a stock market value of more than $1bn.