Japanese crypto exchange says $400m in currency lost

Japanese crypto exchange says $400m in currency lost

Power cables connect to cryptocurrency mining rigs composed of Antminer S9 ASIC machines on racks at the HydroMiner GmbH cryptocurrency mining facility near Waidhofen an der Ybbs, Austria, on Friday, Jan. 19, 2018. Photographer: Akos Stiller/Bloomberg

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