Wu said that according to News.bitcoin, the US FBI raided a network that used fake cryptocurrencies for illegal gambling, and Jonathan Arvay, a resident of Denver, Colorado, was convicted of operating an illegal gambling business. Arvay used a fake cryptocurrency called Obsidian Digital Asset Coin (ODAC) to cover up the exchange of gambling points and cash, and customers had to pay a handling fee to exchange ODAC for US dollars. The crackdown exposed the fraud and money laundering involved, and the related gambling venues were spread across many places in Colorado.