Author: Culper Research(@CulperResearch)
Compiled by: Deep Tide TechFlow
Original title: Culper Research: Why We Are Firmly Shorting ETH
Deep Tide Introduction: Culper Research is a well-known short-selling institution on Wall Street that has accurately targeted several high-profile companies. This report directly addresses the core issue: the Fusaka upgrade in December 2025 brought a large amount of cheap block space, but real organic demand has not kept up—the "prosperous" on-chain data is actually fabricated by address poisoning attacks. Vitalik himself is selling a large amount of ETH, while Tom Lee, Ethereum's most staunch bull advocate, is still defending it with incorrect data. This article is not a prediction; it is a short-selling thesis with data and verification, worth reading carefully for every ETH holder.
We are shorting Ethereum and ETH-linked securities, including BMNR.
We believe that the Fusaka upgrade in December 2025 has severely damaged Ethereum's token economic model. Vitalik himself knows this and is continuously selling; while Tom Lee, ETH's most steadfast bull, is pouring good money into a bad bet.
$ETH will continue to fall.
Tom Lee's Defense: Active Addresses and Transaction Volume Are Rising
Tom Lee's $BMNR defends ETH, claiming that "ETH is not entering a death spiral because utility is rising." He cites the surge in ETH active addresses and transaction volume after Fusaka as evidence of "strengthening fundamentals" and institutional adoption.
Lee's logic is wrong.
By his own logic, if ETH's on-chain activity does not reflect real utility value growth, then ETH is heading toward a death spiral.
Our research shows that this is exactly what is happening.
The full report and disclosure information are now available at culperresearch.com.
The Truth About On-Chain Data: 95% of New Wallets Are Poisoning Attacks
Our comprehensive analysis of on-chain data from January 2025 to February 2026 shows: The "institutional adoption" data cited by Tom Lee is actually explained by large-scale low-value address poisoning/wallet dusting attacks triggered by the block space surplus brought by Fusaka.
Specific data after Fusaka:
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95% of new wallet growth is explained by newly created "poisoned" wallets
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Address poisoning attacks have increased by more than 3 times
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Poisoning attacks explain more than 50% of ETH transaction volume growth
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Poisoning attacks now account for 22.5% of all ETH transactions
Fusaka Upgrade: Gas Fees Collapsed by 90%, 3-9 Times Worse Than Expected
Fusaka increased the gas limit from 45 million to 60 million, aiming to scale Ethereum L1. Vitalik and PTG estimated that gas fees would drop by 10-30%.
Reality: Gas fees dropped by about 90%.
Vitalik and the validators severely underestimated L1 demand elasticity, with an error of 3-9 times—using outdated mathematical models from before EIP-1559 and before L2s emerged.
Vitalik Is Selling Like Crazy
This is why we believe Vitalik is selling ETH heavily. On January 30, he announced he would sell 16,384 ETH to fund the Ethereum Foundation's "austerity period." Since then, he has sold over 19,300 ETH and is still continuing.
He knows what Tom Lee does not: ETH's token economic model has collapsed.
We Personally Verified the Address Poisoning Attack
We documented the ETH address poisoning process firsthand: We created two new wallets, initiated a transfer between them, and were targeted by a poisoning attack within 5 minutes.
We encourage readers to verify this themselves.
Losses from poisoning attacks have grown at a rate more than 8 times faster than before Fusaka.
The Validator Flywheel Is Reversing
Additionally, the gas limit increase has severely hit ETH validators, who now see a 40-50% drop in tips per unit of gas. Lower returns reduce staking demand and high-value activity, thereby weakening the foundation for institutional adoption.
The flywheel is now spinning in reverse.
Ethereum Is Losing to Solana and Its Own L2s
Meanwhile, ETH continues to cede share:
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Solana developers grew by 29% in 2025, while Ethereum only 6%; talent is draining away
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Visa and Citigroup chose Solana to build DeFi applications
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Solana DEX trading volume is now more than double that of Ethereum
Conclusion: The Next Nokia
During the internet bubble era, Netscape and Nokia dominated the market for over a decade, but ultimately, Google and Apple reaped the rewards.
We view ETH in the same light.
We believe the token economic model has collapsed, Tom Lee is in over his head, and $ETH will continue to decline.
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