Fidelity Says Bitcoin Security Holds Up Despite Post-Halving Miner Pay Cuts

Fidelity Digital Assets is pushing back on a central criticism of Bitcoin’s long-term security: that falling block rewards from repeated halvings will eventually weaken incentives for miners and make sustained attacks more feasible. In a new research report, Fidelity argues that Bitcoin’s economic model is broader than issuance alone and that the network’s security can remain robust even as subsidies decline.

The report, authored by Fidelity research analyst Daniel Gray, reiterates that transaction fees and other market incentives help miners maintain profitability and continue contributing hash power. The debate matters to investors and builders because Bitcoin’s fixed issuance schedule steadily reduces new coin supply until the block subsidy disappears—leaving the question of whether fees and incentives will fully replace that funding over time.

Key takeaways

• Fidelity argues Bitcoin’s security relies on multiple economic forces, not just block rewards.
• Gray cites historical miner incentives strengthening alongside Bitcoin’s price, despite declining issuance across halving cycles.
• Miners still face intense near-term financial pressure, even as the long-term security narrative remains contested.
• Publicly traded miners’ shift toward AI and high-performance computing highlights costs and operational demands that differ from typical mining setups.

Why Fidelity says halving won’t automatically erode security

One of the most persistent concerns around Bitcoin’s programmed supply is that each quadrennial halving reduces the block subsidy that miners earn. Critics contend that, over the long run, declining issuance could lower miner revenue and weaken incentives—unless transaction fees rise enough to compensate for the reduction.

Fidelity’s new analysis challenges that framing by arguing that block rewards are only one part of the security equation. According to the report, miners are also supported by transaction fees and by broader market incentives that keep attacks economically unattractive. Put simply, the network does not depend solely on how many new coins are created per block; it depends on whether miners can still justify securing the chain in the face of costs and risk.

Fidelity’s report also engages with the larger timeline investors watch: Bitcoin’s issuance schedule reduces new supply gradually, and eventually the block subsidy will reach zero. That future transition is why the fee-versus-subsidy question remains central for developers, economists, and market participants.

Miner revenue and incentives across halving cycles

Fidelity points to data showing that miner revenue has risen substantially over time, rather than weakening in line with reduced subsidies. Gray notes that since April 20, 2024, miners have been receiving a subsidy of 3.125 BTC per block—down from 6.25 BTC during the prior halving cycle.

In the report, Gray argues that lower issuance hasn’t translated into weaker incentives because Bitcoin’s rising price has more than offset the decline in block rewards. He also highlights the growth in average daily miner revenue, which he says increased from roughly $26,300 during Bitcoin’s first halving cycle to more than $40.2 million at present.

“Despite declining issuance, miner incentives — and by extension, network security — historically strengthened alongside Bitcoin’s price,” Gray writes. The underlying implication is that if miners continue to capture enough value from the combination of price, fees, and other economic dynamics, the network’s security budget can remain sufficient even as subsidy-based income shrinks.

Fidelity’s argument is particularly relevant for readers who view halvings as deterministic security “stress tests.” Instead of treating reduced issuance as an automatic negative, the report frames miner incentives as a responsive system that has historically adapted when the asset price and fee environment improve.

The security debate versus miners’ real-world financial strain

While Fidelity emphasizes long-term economic resilience, the same period has also exposed serious near-term pressures for many mining firms—especially those operating as public companies. Industry commentary cited in connection with the report describes the current environment as among the most difficult on record, pointing to a combination of lower mining rewards, rising costs, and increasing competition.

That gap between long-term theory and short-term operating reality is where the industry’s behavior becomes important to watch. The source material notes that some miners have diversified into artificial intelligence and high-performance computing, using existing power infrastructure and data center assets to pursue demand from AI workloads instead of relying solely on Bitcoin mining.

In this context, an earlier Cointelegraph report referenced a VanEck estimate suggesting publicly traded miners could require up to $50 billion in additional capital to fully transition to AI infrastructure. The scale of that estimate underscores why many mining companies are making strategic pivots now: even if long-term Bitcoin security remains intact, the companies themselves may need liquidity and capital to remain competitive and operationally flexible.

Why “AI pivot” operations are harder than mining

One reason the pivot to AI and HPC is costly—and not simply a rebranding of mining—is that uptime, reliability, and facility requirements differ from typical mining setups. A quote attributed to Blocksbridge Consulting in the source material contrasts the two environments: a Bitcoin mine, the publication notes, can run with relatively simpler infrastructure and ASIC fleets that can tolerate faster curtailment. AI and HPC facilities, by contrast, require higher standards for continuous operation.

According to the same source, AI and HPC deployments demand greater electrical redundancy, improved cooling, tighter network requirements, and more responsive customer support—factors that add both engineering complexity and capital intensity.

This operational reality can matter for investors and analysts trying to interpret miner behavior. If mining economics remain uncertain on a quarter-to-quarter basis, firms may pursue non-Bitcoin revenue streams not because Bitcoin’s security thesis is wrong, but because maintaining balance sheets and meeting facility requirements in adjacent markets can be just as challenging as competing on hash rate.

Looking ahead: the fee question remains the test

Fidelity’s report argues that Bitcoin can stay secure even as issuance falls, but the broader market will still be watching the transition from subsidy-led revenue to fee-led revenue. The most important near-term signals are how transaction fee levels evolve relative to miner costs, and whether miners’ financial restructuring efforts can be sustained without undermining their ability to keep contributing to network security.