A woman has been convicted for her role in a multibillion-pound bitcoin fraud after what is thought to have been the world’s largest cryptocurrency seizure. Zhimin Qian, also known as Yadi Zhang, 45, orchestrated a fraud in China between 2014 and 2017 that left 128,000 people out of pocket. She stored the proceeds in bitcoin, but UK authorities made a breakthrough in the case when they raided a Hampstead mansion in 2018 and seized devices from Qian holding 61,000 bitcoins, worth more than £5bn at current prices. The Metropolitan police…