A Florida man pleaded guilty on Monday to charges that he conspired to operate an illegal bitcoin exchange, which prosecutors said was owned by an Israeli who oversaw a massive scheme to hack companies, including JPMorgan Chase & Co . Anthony Murgio, 33, entered his plea in federal court in Manhattan to three counts, including conspiracy to operate an unlicensed money transmitting business and conspiracy to commit bank fraud, a month before he was to face trial. U.S. District Judge Alison Nathan scheduled his sentencing for June 16.