China might use its digital renminbi for surveillance over its users and to control global currency transactions, the head of the British digital spy agency GCHQ, Sir Jeremy Fleming, has suggested in an interview with the Financial Times. He noted that while digital currencies in general present a "great opportunity" for the world, they might be misused.Fleming went on to say that efforts by a foreign state to gather information on British citizens en masse might prove "deeply intrusive" and result in an "erosion of [the UK's] sovereignty". He added that China is not coordinating its efforts in introducing digital...