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While rug pulls dupe multiple investors at a time, many crypto crimes target individual victims.

Mr Agyemang-Prempeh's defence, when challenged by the BBC, was that he had himself been duped by other agents and did not realise he was selling fake CoS documents.

Hundreds of people were duped into ploughing their life savings and pensions into casks that were overpriced or did not exist, while some individual casks were sold multiple times to different investors.

A woman who duped a man into believing they were having twins, until her fake baby bump was exposed in a hospital scan, has been jailed and given a restraining order.

He had researched the logos, signatures and even the type of paper licences were printed on to dupe the seller, who committed no offence.