Ethereum’s "Death Spiral": Culper Research Sounds the Alarm on Network Economics

Disclosing short positions on Ethereum (ETH) and related equities, particularly aimed at BitMine (BMNR), Culper Research shocked the digital asset market on March 5, 2026. Following the December 2025 Fusaka upgrade, the company's central idea holds that Ethereum is spiraling toward a basic "death". Raising the gas cap to 45–60 million caused the upgrade to accidentally cause a $90% drop in transaction costs, much higher than the intended 10–30% drop. This income loss directly compromises validator staking yields, establishing a hazardous feedback loop whereby lesser rewards result in decreased network security, hence lowering the long-run value and demand for the ETH token.

By identifying recent network activity peaks as "low-value" or artificial, Culper's report questions the dominant bullish tale. Their analysis implies that 95% of new wallets established following upgrade are tied to spam; address poisoning and "dust attacks" now make up 22.5% of total transaction volume—a 3x rise that conceals a lack of organic uptake. Moreover, the company noted major ETH liquidations by co-founder Vitalik Buterin in early 2026, implying a disconnect between internal activities and public hope. By describing recent on-chain indicators as a "low-value surge" instead of sustained development, this data directly contradicts prominent bullish projections such as those of Tom Lee.

Institutional holders and corporate ETH approaches will suffer immediately as a consequence of this study. Particularly, BitMine (BMNR) is at greater risk because of its large ETH treasury, which makes the value of the company exposed to more price deterioration. Culper cautioned that the continuous erosion of fees will keep challenging the structural incentives of the network as ETH traded $1–2% lower just after the announcement. Should validator yields not rebound, the ensuing capital flight away from the staking ecosystem may radically revalue Ethereum and any companies tied to its balance sheet.