In Washington State, a court handed down a 16-month prison sentence to two Estonian citizens on Tuesday. The conviction stems from their involvement in a large-scale cryptocurrency Ponzi scheme that amassed over $500 million.

Sergei Potapenko and Ivan Turõgin, both age 40, collaborated with four other individuals, whose identities remain undisclosed, to orchestrate the fraudulent scheme. They enticed investors with a fabricated crypto mining venture, according to a statement released by the Department of Justice on Tuesday.

Court records reveal that around 2013, the pair established a company named HashCoins. This company advertised the sale of equipment purported to mine Bitcoin and other digital currencies. Despite receiving a high volume of orders from customers, HashCoins never actually manufactured the mining equipment themselves. Instead, they acquired and assembled components from other companies. Crucially, they consistently lacked the inventory necessary to fulfill the promises made to their customers.

As customer complaints mounted, Potapenko and Turõgin shifted their strategy, promoting “remote” mining services. This new approach promised investors a portion of profits from a shared mining operation known as HashFlare. Investors could monitor their supposed earnings through an online portal. However, accessing and withdrawing these earnings proved to be problematic. Investigations showed that HashFlare possessed only 1% of the bitcoin mining computational power it had sold to customers, and a mere 3% of the bandwidth required for mining altcoins.

Potapenko and Turõgin have already spent 16 months in custody and will be repatriated to Estonia to serve supervised release. Authorities in the U.S., along with international law enforcement partners, seized assets belonging to the men, exceeding $450 million in value. These assets encompassed cryptocurrency, cash, vehicles, real estate, and crypto mining hardware. The forfeited property will be used to provide restitution to victims of the scheme, who number in the hundreds of thousands globally.

According to official statements, prosecutors had advocated for a 10-year prison sentence. The Justice Department is reportedly considering an appeal against the current sentence.

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