A legal dispute in the UK questions the legality of certain crypto derivatives operations. A British engineer claims 324.8 bitcoins, valued at approximately 26.5 million dollars as of October 14, 2026, after more than a thousand losing trades. He believes the platform did not have the necessary authorization to offer these financial products to British clients. This case could also involve other traders who carried out similar operations between 2018 and 2022 on the BitMEX platform.