India’s Biggest Bitcoin Ponzi Scheme Co-founder Was Caught at the Airport Trying to Flee the Country

India’s Central Bureau of Investigation arrested Ayush Varshney, co-founder and CTO of Darwin Labs, at Mumbai’s Chhatrapati Shivaji Maharaj International Airport on March 9 as he attempted to board a flight to Sri Lanka, nearly a decade after the GainBitcoin scheme he allegedly helped build defrauded thousands of investors of up to 80,000 Bitcoin.

The Scheme and Varshney’s Alleged Role

According to the official PIB statement, GainBitcoin operated from approximately 2015 under the corporate entity Variabletech Pte. Ltd., promising investors monthly returns of 10% in Bitcoin over 18 months through a cloud mining operation. The structure was a classic Ponzi mechanism. Early investors received returns funded by new capital rather than mining revenue. As new investment slowed, the scheme switched payouts from Bitcoin to MCAP, a lower-value proprietary token that Darwin Labs allegedly developed specifically for the operation. Investors who joined expecting Bitcoin returns received depreciating MCAP tokens instead as the scheme collapsed under its own mathematics.

Varshney and Darwin Labs are accused of building the entire technical infrastructure that made the operation functional at scale. The MCAP ERC-20 token contracts, the GBMiners.com platform, and the GainBitcoin investor website were all allegedly Darwin Labs products. The technical sophistication of the operation, including functional smart contracts and a professional investor portal, helped establish credibility with investors who might otherwise have recognized the scheme’s unsustainable return promises.

The financial scale of the fraud is disputed within a wide range. Investigators estimate losses between 29,000 and 80,000 Bitcoin, valued between $2 billion and $8 billion at current prices. The range reflects the difficulty of tracing cryptocurrency flows across a decade of transactions involving multiple wallets, exchanges, and jurisdictions. Even at the lower estimate, GainBitcoin ranks among the largest crypto frauds in history by Bitcoin volume.

The Decade-Long Investigation

The case has moved slowly through India’s legal system since the scheme collapsed. Sahil Baghla and Nikunj Jain, two other Darwin Labs co-founders, were arrested in 2018. The alleged mastermind Amit Bhardwaj was arrested, convicted, and died in 2022 before completing his sentence. His brother Ajay Bhardwaj remains a key figure in the ongoing investigation. The Supreme Court of India ordered the CBI to take over the case in December 2023, consolidating numerous First Information Reports filed across multiple states into a single coordinated probe. That consolidation is what produced the Look Out Circular that flagged Varshney at immigration.

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The airport interception followed the standard pattern for LOC-based detentions. Immigration authorities at Mumbai flagged Varshney’s travel attempt, detained him, and transferred him to CBI custody. He was formally arrested the following day after the handover was processed.

What the Arrest Means

The GainBitcoin prosecution is the largest active crypto fraud case in India and one of the few cases globally where technical infrastructure developers rather than just promoters and executives are facing criminal liability. The charges against Varshney as the person who allegedly built the smart contracts and platforms, rather than the person who marketed the scheme, establish a precedent for developer liability in crypto fraud cases that echoes the Roman Storm Tornado Cash retrial covered in this publication earlier this week.

The distinction between building infrastructure and operating a fraud is the central legal question in both cases. In the GainBitcoin prosecution, the allegation is that Varshney built infrastructure specifically designed to facilitate fraud rather than general-purpose tools used by others. That distinction may determine the outcome of his case as the CBI prosecution develops.

One of the many

The GainBitcoin arrest is not an isolated case. Two weeks ago, U.S. federal authorities arrested Christopher Alexander Delgado, 34, of Apopka, Florida, accusing him of running a $328 million cryptocurrency Ponzi scheme through his Orlando-based company Goliath Ventures Inc. between January 2023 and January 2026.

The DOJ filed charges in the U.S. District Court for the Middle District of Florida, alleging Delgado defrauded thousands of investors through a company he rebranded from Gen-Z Venture Firm, a naming choice that reflects the same demographic targeting identified in the Northwestern Mutual data published earlier this week, where 32% of Gen Z reported crypto investment interest driven largely by feeling financially behind.

The pattern across both cases is consistent: sophisticated-looking infrastructure, unrealistic return promises, and operators who relied on the complexity of crypto mechanics to obscure what were ultimately straightforward fraud schemes.

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