Retrieved June 7, 2022. ↑ Stier, Frank. "Das Verstummen der Cryptoqueen". heise online. ↑ "So etwas Dubioses nie erlebt". January 20, 2012. ↑ "BigCoin & BNA: The original OneCoin Ponzi points". ↑ "'Cryptoqueen' brother admits role in OneCoin fraud".