Hong Kong police are investigating a blackmail and false imprisonment case in which a man lost about HK$6.1 million (US$779,900) in cryptocurrency and silver. The force said it received a report at 3.52am on Saturday that a 25-year-old mainland Chinese man was attacked by three men and a woman at a hotel on Tak Fung Street in Hung Hom and had HK$5.3 million worth of cryptocurrency taken from his account. The suspects later took the victim to another unit in an industrial building on Man Lok...