On Sept. 9, 2024, the F.B.I.’s Criminal Investigative Division reported that “as the use of cryptocurrency in the global financial system continues to grow, so too does its use by criminal actors.” The exploitation of cryptocurrency, according to the …

The pitch from “ZMoney” arrived on the encrypted messaging app Signal just days before Donald J. Trump’s presidential inauguration. “ZMoney” was Zachary Folkman, an entrepreneur who once ran a company called Date Hotter Girls and was now representing …