Author Jennifer McAdam has been forced to cancel a promotional tour for her book ‘Devil’s Coin’ exposing the crypto pyramid Onecoin which defrauded millions of investors around the world, the Scottish Sun newspaper reported. McAdam writes about Onecoin’s founder Ruja Ignatova, dubbed the “missing Cryptoqueen” as she is still wanted by Interpol, Europol, and the U.S. Federal Bureau of Investigation (FBI), which put it on its ten most-wanted fugitives list.