Montenegro has approved the extradition of a South Korean mogul known as “the cryptocurrency king” to the United States, the Balkan country's Justice Ministry said on Friday. Minister Bojan Bozovic has issued a deposition allowing the handover of Do Kwon, the founder of the Singapore crypto firm Terraform Labs who was arrested in Montenegro last year, according to the ministry. It was not immediately clear when exactly Kwon would be sent to the U.S.