描述
The OneCoin scam, masterminded by Ruja Ignatova and Sebastian Greenwood, duped investors globally with promises of a revolutionary cryptocurrency. Operating as a Ponzi and pyramid scheme, OneCoin fabricated transactions without a legitimate blockchain. Ignatova vanished in 2017, triggering international investigations that led to arrests and convictions of key figures involved in the $4 billion fraudulent operation. She was added to the FBI Ten Most Wanted in June 2022, currently, a $5 million reward is offered for information leading to Ignatova's whereabouts.