Bitcoin Mining's Power Dilemma: A Comprehensive Analysis from Mechanism to Policy

Bitcoin mining energy consumption has long exceeded common expectations. A 2021 study from Cambridge University shows that Bitcoin mining consumes 134.89 terawatt-hours of electricity, which, if considered as an independent national energy system, ranks 27th globally, with annual electricity use comparable to Malaysia’s total yearly consumption. What operational mechanisms are hidden behind these figures? Why does mining energy consumption continue to rise?

Why Is Mining Energy Use Continually Increasing? Difficulty Adjustments and Hardware Arms Race

In the early days of Bitcoin, Satoshi Nakamoto used just a home computer to mine 50 bitcoins with minimal energy. But as participation surged, the situation changed fundamentally.

This stems from Bitcoin’s unique issuance mechanism. The total supply is capped at 21 million coins. Each time a new “block” (mining reward) is found, miners receive a reward. Initially, each block rewarded 50 bitcoins, but after every 210,000 blocks, the reward halves. This means that to maintain the same income, miners must invest more computing resources.

To illustrate simply: initially, one computer running for a day could mine one bitcoin, but with difficulty adjustments, it evolved into needing two computers running for two days, four computers for four days. Difficulty increases exponentially, and power consumption multiplies accordingly.

To stay competitive, mining farms engage in a “hardware arms race.” Early CPU calculations evolved into GPU computations, then to specialized “mining chips.” These professional devices often run high-load operations using high-performance graphics cards and chips. A single mining machine consumes about 35 kW, and a large-scale mining farm’s daily electricity use can meet a lifetime’s electricity needs for an average household.

Besides the main computing power, data centers require massive cooling systems. The heat generated during operation risks causing shutdowns, and continuous operation of power supply fans and chassis cooling further amplifies overall energy consumption.

The Value Myth of Bitcoin Mining: Blockchain Technology vs. Energy Waste

So, what actual value does Bitcoin mined with such enormous electricity resources have?

Bitcoin was born during the 2008 global financial crisis. At that time, the Federal Reserve implemented loose quantitative easing policies, leading to massive dollar issuance and increased devaluation risk. Satoshi Nakamoto aimed to challenge the dominance of traditional currency systems by creating a decentralized digital currency. The first “genesis block” appeared in early 2009.

Initially, Bitcoin circulated only among programmers, with negligible value. A famous story recounts a programmer exchanging 1,000 bitcoins for two pizzas. Later, driven by tech enthusiasts, Bitcoin gradually gained global recognition and even became a “hard currency” for dark web transactions.

In 2020, the Fed again “printed money,” with the amount issued that year accounting for 21% of all dollars ever created. Bitcoin reached a historic high, breaking $68,000 per coin.

However, Bitcoin’s valuation involves a fundamental paradox. From a labor theory of value perspective, Bitcoin’s worth can only be considered “zero.” First, society didn’t need it at inception; it wasn’t a survival necessity. Second, the mining process can’t be measured by traditional labor—most work is done by machines. Essentially, Bitcoin remains outside the circulation of tangible goods and lacks true commodity attributes.

The current sky-high prices are merely market bubbles driven by speculation. If Bitcoin has any value, it is limited to its decentralization, anonymity, and difficulty of loss—its technical premiums. But once it reverts to its original “currency” purpose, it risks being squeezed out by mainstream financial systems. Ironically, the only “real” value Bitcoin mining might produce is the astronomical electricity bills and depreciation costs of mining equipment.

Global Policy Tightening and Bitcoin Mining Regulation

As energy consumption continues to rise, regulators worldwide are beginning to scrutinize this phenomenon.

In mid-2021, China’s central bank announced measures to crack down on virtual currency trading and mining, involving major financial institutions. This was not a hasty decision but a carefully considered move based on economic and social factors.

Statistics show that before May 2021, nearly 70% of global Bitcoin mining operations were concentrated in China. Miners exploited regional electricity differences—using cheap hydropower during flood seasons in Yunnan, Guizhou, Sichuan, and shifting to coal-fired power in Inner Mongolia and Xinjiang during dry seasons. Based on current trends, by 2024, China’s Bitcoin mining energy consumption could equal the annual output of three Three Gorges Dam hydroelectric stations.

Following ongoing policy suppression, domestic Bitcoin mining farms have largely exited, effectively curbing energy waste.

Energy Strategy and Financial Security: China’s Deep Considerations in Banning Mining

This resolute policy stems from multiple strategic considerations:

Energy Independence and Industrial Development

Bitcoin mining can infinitely strain energy quotas of other industries, undermining the power base for industrial upgrading. The country controls limited electricity resources; allowing virtual assets to consume them threatens the development of the real economy and strategic emerging industries.

Financial Security and Social Governance

Bitcoin’s anonymity makes it a “natural shield” for cross-border money laundering, drug trafficking, and scams. Cracking down on mining effectively cuts off the financial lifeline of black markets, an important part of anti-crime efforts.

Sovereignty and Financial Stability

In a turbulent global economy, virtual assets like Bitcoin are highly volatile, capable of destroying national financial systems. In September 2021, El Salvador declared Bitcoin legal tender, causing worldwide shock. But subsequent bear markets led to losses of millions of dollars, pushing the country toward bankruptcy. This serves as a stark warning: over-reliance on virtual assets can plunge a nation into financial crisis.

Fundamentally, “speculating on coins” is akin to gambling; it erodes rational decision-making and diminishes the hardworking spirit of a nation. China’s firm crackdown on Bitcoin mining is a rational choice to protect energy resources and maintain financial order and social integrity.