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Market capitalization of Bitcoin miners in the United States exceeds $50 billion in September, according to JPMorgan

According to JPMorgan, the combined market capitalization of fourteen U.S.-listed Bitcoin miners reached a record $56 billion in September 2025, marking a 43% increase from August and reflecting a major shift in investor confidence. This surge comes even as the network’s rising hashrate puts pressure on miner profitability, highlighting a pivotal transformation in the sector’s value proposition.

Network Data and Competitiveness

The record valuation occurred alongside significant changes in network dynamics and stock performance, painting a complex picture of the industry’s health.

  • Valuation and Performance: The mining sector’s combined market cap soared to $56 billion in September. This rally was largely driven by the stocks themselves, with twelve of the fourteen miners tracked by JPMorgan outperforming Bitcoin’s price during the month. Other industry reports noted an even broader surge, with the combined valuation of 15 major mining stocks reaching $58.1 billion, more than doubling from a low in March.

  • Network Pressure Intensifies: While valuations climbed, the network became more competitive. The average Bitcoin hashrate—the total computational power dedicated to mining—increased by 9% in September to 1,031 exahashes per second (EH/s). This growth squeezed profitability; JPMorgan estimated that daily block reward revenue fell 10% from August to $49,700 per EH/s, with gross profit declining 17% from the previous month.

Corporate Moves and Strategic Consequences

The driving force behind this investor enthusiasm appears to be a strategic pivot away from pure-play Bitcoin mining and toward diversified digital infrastructure.

  • Diversification into AI and HPC: Mining companies are actively securing long-term contracts to provide high-performance computing (HPC) and artificial intelligence (AI) services. For instance, Cipher Mining signed a 10-year, $3 billion agreement with AI cloud provider Fluidstack. Similarly, TeraWulf announced AI hosting deals dedicating over 200 megawatts of capacity, and Australian miner IREN is projecting $500 million in annual AI revenue by 2026. This shift provides stable, dollar-denominated revenue that reduces their dependence on Bitcoin’s price cycles.

  • Navigating a Critical Window: This strategic shift is creating a new investment case. Analyst reports suggest that the market is now revaluing miners based on their potential to secure “lease price” from contracted power sales, which could become as important as the traditional “hash price” metric. The sector faces a decisive period where success in landing these HPC contracts and improving energy efficiency will determine if the recent market cap boom translates into sustainable, long-term profitability.

This record market capitalization signals that investors are betting on Bitcoin miners evolving into next-generation data infrastructure providers. Their ability to successfully navigate this transition will be the true test of their future value.

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