According to CoinMeta, as reported by Bitcoin.com and News, an investigation by the Spanish National Guard found that during the collapse of the cryptocurrency platform arbistar in September 2020, 881 bitcoins were transferred to external wallets. From January to March 2021, wallets associated with the main defendants saw a total inflow and outflow of over 20,000 bitcoins, worth more than $1.1 billion. The platform was classified as a Ponzi scheme involving 32,000 investors, and the whereabouts of approximately $1 billion in investor funds from 2020 remain unknown. The founder Santiago Fuentes Jover and partners Diego Fern, ndez, and Nojarova were sentenced to 16 years and 11 years in prison, respectively.