A renowned firm in the City of London has been preparing a lawsuit against fugitive crypto-queen Ruja Ignatova over a billion-pound fraud with cryptocurrency OneCoin, the Daily Mail reports. According to the US Department of Justice, in the middle of 2017, the company of the Bulgarian woman accumulated more than 14 billion pounds.

The scheme has been called "one of the biggest scams in history" and Ruja Ignatova plays a major role in its promotion. She disappeared in 2017 and her name is on FBI's most wanted list. The American authorities give $250,000 for information that would lead to her arrest.

The Mishcon de Reya law firm is planning a class action lawsuit in the High Court, UK media also reported.