Bitcoin Crypto U.S. Regulators Subpoena Tether and Bitfinex Amid Crypto Market ConcernsBy Karly MarieJune 26, 2019Updated:March 9, 20253 Mins Read The U.S. Commodity Futures Trading Commission (CFTC) has subpoenaed Tether and Bitfinex, raising questions about their financial transparency and potential market manipulation. Could this shake up the crypto world?