A U.S. federal court has sentenced two Estonian nationals to prison for running a massive cryptocurrency HashFlare Ponzi scheme that duped hundreds of thousands of victims worldwide out of more than half a billion dollars. The case, described by prosecutors as a “mirage of cryptocurrency mining,” is one of the largest fraud schemes involving digital assets ever prosecuted in the United States.
On Wednesday, U.S. District Judge Robert S. Lasnik handed down 16-month prison sentences to Sergei Potapenko and Ivan Turõgin, both 40, for conducting a four-year scheme that generated more than $577 million in illicit proceeds.
The men have already served their custodial term while in pretrial detention and will return to Estonia to complete their supervised release, which includes 360 hours of community service and the payment of a $25,000 fine each.
Seized Assets Worth $450 Million to Compensate Victims
In addition to the prison sentences, the court ordered the forfeiture of cryptocurrency, bank funds, real estate, vehicles, and cryptocurrency mining equipment collectively valued at over $450 million. These assets, seized by U.S. and international law enforcement partners, will be used in a remission process to help repay defrauded victims. Authorities said details of the compensation process will be announced in due course.
Acting U.S. Attorney Teal Luthy Miller condemned the scheme as “a classic Ponzi operation dressed up in the allure of cryptocurrency.”
“They diverted millions of dollars to their own benefit—buying bitcoin, luxury cars, real estate, expensive jewelry, and taking more than a dozen trips on private jets,” Miller said. “Meanwhile, the vast majority of their victims suffered devastating losses.”
The HashFlare Ponzi Scheme
According to court documents, Potapenko and Turõgin operated a cryptocurrency mining service called HashFlare Ponzi Scheme between 2015 and 2019. The company sold contracts to investors worldwide, promising them a share of profits from cryptocurrency mining.
In legitimate cryptocurrency mining, specialized computers validate blockchain transactions and receive newly minted digital coins as rewards. But in the case of HashFlare Ponzi Scheme, prosecutors say the mining activity was largely fabricated.
HashFlare’s online dashboards showed fake statistics about mining power and returns, creating the illusion of a thriving mining operation. In reality, the company lacked the computing capacity to mine the vast majority of the cryptocurrency it claimed to produce.
Instead of using investor funds to expand mining operations, Potapenko and Turõgin allegedly funneled money into personal accounts and investments, purchasing properties, high-end vehicles, and luxury goods.
Lavish Lifestyle Funded by Investor Money
The investigation revealed that the pair spent investor funds on:
- Multiple luxury residences and commercial properties.
- High-end cars, including premium European models.
- Expensive jewelry and personal luxury items.
- More than a dozen trips aboard chartered private jets.
Authorities have seized or restrained most of these assets, which have been preliminarily forfeited.
Global Victims, Global Cooperation
The fraud drew in victims from across the globe, including the United States. Many suffered significant financial and emotional consequences, prosecutors said. Some lost life savings in what they believed was a legitimate and lucrative investment in digital mining technology.
The scale of the HashFlare Ponzi Scheme prompted a coordinated international investigation. The Cybercrime Bureau of the Estonian Police and Border Guard worked closely with U.S. law enforcement, while Estonia’s Prosecutor General, Ministry of Justice, and Ministry of Digital Affairs assisted in extraditing the defendants to the United States. The DOJ’s Office of International Affairs also played a crucial role in securing evidence and managing cross-border legal processes.
While the forfeited $450 million in assets offers hope of partial restitution, many victims are unlikely to recover their full losses. The remission process, once detailed, will involve claims verification and asset liquidation, which could take years.
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