A 42-year-old Chinese woman named Jian Wen faced legal issues when attempting to purchase high-end properties in London. Authorities discovered she owned a significant amount of Bitcoin, totaling over 61,000, which was valued at approximately £1.4 billion at the time. The current value of these Bitcoins has since increased to more than £3 billion. Investigators suspect that about 23,308 of these Bitcoins, worth over £1 billion, might be connected to illicit activities.