In 2023, the FBI logged almost 70,000 complaints of fraud tied to cryptocurrencies. Americans were duped out of more than $5.6 billion last year through fraud schemes involving cryptocurrency, the FBI said in a report released Monday that shows a 45% jump in losses from 2022.The FBI received nearly 70,000 complaints in 2023 by victims of financial fraud involving bitcoin, ether and other cryptocurrencies, according to the FBI.