Bitcoin Halving Slashes Miner Revenue, Accelerating Hashrate Market Consolidation: What Lies Ahead for Small and Medium Mining Farms?

Bitcoin halving, the once-every-four-years 'big event' for the digital gold, has once again stirred waves in the cryptocurrency world. The halving of block rewards means that the amount of Bitcoin miners receive for each block mined is directly cut in half. For the entire industry, this is both a reinforcement of the scarcity narrative and a brutal test of miners' survival capabilities. When the reward 'pie' suddenly shrinks, miners' profit models face unprecedented challenges, and the reshuffling of the hashrate market may have only just begun.

Reward Halving: The Moment Miners' Income Is 'Cut in Half'

The core mechanism of the Bitcoin halving is to reduce the block reward miners receive through Proof of Work (PoW) by half. In the 2024 halving event, the block reward dropped from 6.25 BTC per block to 3.125 BTC. This means that, all else being equal, miners' direct income instantly decreased by 50%. For miners who rely on block rewards as their primary income source, this is undoubtedly a 'halving' blow.

Although the price of Bitcoin often fluctuates around the halving, and in some cycles significant price increases can offset the impact of reduced rewards, the situation in 2024 was more complex. Reports indicate that in the months following the halving, Bitcoin's price did not experience the 'halving rally' that the market had anticipated, but instead traded in a high-level range. However, volatility in transaction fees and a continuous rise in network hashrate meant that miners' actual earnings were not optimistic. According to CoinGecko data, miners' total daily revenue (block rewards plus transaction fees) after the halving saw a significant decline compared to before, with some small mining farms' cash flows even approaching depletion.

The Profit Model Dilemma: From 'Easy Money' to 'Precision Accounting'

In the early days of Bitcoin mining, as long as miners had sufficient hashrate, they could almost 'make easy money.' However, with successive halvings, the profit model of the mining industry has undergone a fundamental transformation. In the past, miners' income mainly relied on block rewards, with transaction fees accounting for only a small portion. But after the reward halving, transaction fees have passively increased their share of miners' total revenue, forcing miners to pay more attention to network congestion and transaction fee rates to maximize their earnings.

At the same time, electricity costs have become a critical variable determining miners' survival. After the halving, the production cost per Bitcoin (i.e., the 'breakeven price') has risen significantly. According to industry analysts, after the halving, miners using standard commercial electricity have a production cost per Bitcoin that is close to or exceeds the market price. This means that miners who cannot access cheap electricity (such as renewable sources like hydro or wind power) or who face high electricity costs will experience sustained losses. To survive, miners must conduct more precise cost accounting and even adjust their mining machine operations based on real-time electricity prices, shifting from '24/7 full-load operation' to a refined operational model of 'mining during off-peak hours.'

Survival Crisis for Small and Medium Mining Farms: Accelerated Elimination

Under the dual pressure of reduced income and high costs, small and medium mining farms with weaker risk resistance are the first to suffer. These farms typically lack long-term, stable low-cost electricity contracts and sufficient capital reserves to upgrade to more efficient mining hardware. After the halving, they face not only compressed profits but also a survival crisis due to cash flow disruptions.

Reports indicate that in the months following the halving, some small and medium mining farms have begun reselling their mining machines or relocating to regions with lower electricity costs. Farms that fail to adjust their strategies in time have been forced to shut down and withdraw their hashrate from the network. This 'passive clearing' is not uncommon in the industry, but the halving has undoubtedly accelerated the process. The exit of small and medium farms has led to short-term fluctuations in total network hashrate, but the more profound impact is that it accelerates the trend of hashrate concentration toward large, low-cost mining conglomerates.

Hashrate Centralization: A New Landscape Dominated by Giants

While the halving eliminates outdated capacity, it also provides opportunities for large mining enterprises and capital-advantaged institutions to expand. These giants typically possess the following advantages:

• Economies of scale: Large mining farms can purchase mining machines in bulk at lower prices and spread unit hashrate operating costs through scaled operations and maintenance management.
• Capital advantage: They can more easily obtain financing, complete mining machine upgrades before the halving, and deploy new models with higher hashrate and lower power consumption (such as the Antminer S21 series).
• Energy bargaining power: Large mining companies typically sign long-term, stable low-cost electricity contracts with energy suppliers, or even directly participate in building renewable energy power stations, thereby keeping electricity costs extremely low.

These advantages are further amplified after the halving. When small and medium farms exit due to losses, large mining companies not only refrain from scaling back but may seize the opportunity to acquire second-hand mining machines at low prices or take over abandoned mining facilities, further expanding their hashrate share. According to industry observations, after the halving, the hashrate share of top mining companies has shown an upward trend, and hashrate centralization has become increasingly evident. While this trend helps improve the overall efficiency of the mining industry, it also raises concerns about the decentralization of the Bitcoin network. When a few mining pools or companies control the vast majority of hashrate, the security of the network may face potential risks.

Future Outlook: A New Ecosystem After the Shakeout

The reshuffling of the hashrate market is not the end of the halving, but rather the starting point for a new round of industry evolution. For surviving miners, future competition will no longer be a simple contest of hashrate, but a competition of comprehensive strength—including energy acquisition capabilities, capital operation skills, and the ability to use derivative instruments (such as options and futures). Miners will increasingly use financial tools to hedge against Bitcoin price volatility, lock in future mining revenues, and seek certainty in an uncertain market.

At the same time, the halving has also driven the 'green' transformation of the mining industry. Under cost pressure, miners are more motivated to use clean, cheap energy, which aligns with global demands for sustainable development. Additionally, some miners are beginning to explore using the hashrate of decommissioned mining machines for other fields, such as AI training or distributed computing, to open new revenue streams.

The Bitcoin halving is both a periodic 'stress test' and a 'catalyst' for industry evolution. It eliminates participants that rely on high-cost, low-efficiency operations, making room for more competitive and innovative players. Although the trend toward hashrate centralization is concerning, it may also prompt the community and developers to explore new consensus mechanisms or decentralized solutions to safeguard the long-term health of the Bitcoin network. After this shakeout, the Bitcoin mining industry may usher in a more professional, institutionalized, and efficient new ecosystem, but its decentralized ethos will remain the bottom line that all participants must jointly protect.