Ruja Ignatova, a self-styled 'CyrptoQueen' who defrauded investors of $4 billion through her pyramid scheme-styled company 'OneCoin', is currently the only woman on the FBI's 10 most wanted fugitives list. The 42-year-old vanished after boarding a plane in Bulgaria in October 2017. Karl Sebastian Greenwood, who Co-founded OneCoin, recently pleaded guilty to wire fraud and money laundering charges.