According to Decrypt, the Norwegian National Economic and Environmental Crime Investigation and Prosecution Authority (Økokrim) sued four men on Monday, accusing them of defrauding 963 million Norwegian kroner (about 86.5 million US dollars) through fake investment plans between 2015 and 2018. The fraud gang attracted investors with cryptocurrencies such as OctaCoin, NanoCoin, and Ormeus Coin, promising high returns, but without making any real investments. The victims were spread across Sweden, Belgium, the Netherlands, and China, and they invested their funds in investment projects called Crypto888 Club, Octa Partners, and Nano Club. These brands actually belong to the same Ponzi scheme. After Octa Partners collapsed, it was renamed Nano Club, then Crypto888, and finally Nano Crowd, in order to continue to defraud investors' funds.