Binance chief Changpeng Zhao on Tuesday stepped down and pleaded guilty to breaking U.S. anti-money laundering laws as part of a $4.3 billion settlement resolving a years-long probe into the world's largest crypto exchange, prosecutors said. The deal with the Justice Department, part of a large settlement between Binance and other U.S. agencies, resolves criminal charges for conducting an unlicensed money transmitter business, conspiracy and breaching sanctions regulations. It also leaves Zhao's future uncertain.