Michael and Amanda Griffis, a Tennessee couple, are facing charges by the CFTC for allegedly defrauding more than 100 victims in a multimillion-dollar cryptocurrency scheme. The U.S. Commodity Futures Trading Commission on July 25 accused Michael and Amanda Griffis of Clarksville, Tennesse, of allegedly defrauding more than 100 individuals through a cryptocurrency scheme, netting over $6 million, according to the file.