Is Bitcoin a Waste of Energy?
Before criticizing Bitcoin's energy consumption, let's think about what energy actually is.
“It Uses Too Much Energy”
This is the first thing people say when criticizing Bitcoin. The network’s annual electricity consumption is approximately 100-150 TWh (estimates vary depending on methodology and timing) — roughly the level of an entire country like Norway. Headlines like “one Bitcoin transaction uses as much electricity as a U.S. household does in a month” never stop coming. The fundamental error in this criticism is that it ignores the fact that Bitcoin’s energy consumption scales with network security, not with the number of transactions. Whether there is 1 transaction or 10,000, they fit in the same block, and energy consumption remains the same.
To make this criticism seriously, you need to compare it to the right things.
A Fair Comparison
The global banking system — branches, ATMs, data centers, offices, employee commutes — is estimated to consume about 260 TWh per year (Galaxy Digital Research, 2021). (However, this figure comes from a report with a pro-Bitcoin perspective, so independent verification is needed.) That is 1.7 times Bitcoin’s consumption. Yet banks serve only a portion of the world’s population. 1.4 billion adults do not even have a bank account. Bitcoin works for anyone with internet access.
Gold mining is estimated to consume about 130 TWh per year (same report). Add transportation, storage, and security, and it is comparable to or greater than Bitcoin. Yet no one says “gold mining is a waste of energy.” Because people recognize gold’s value. In the end, whether something is “waste” comes down to whether you assign value to what it produces.
There is one comparison almost nobody makes. The U.S. military, which maintains the dollar’s reserve currency status. Over 750 overseas military bases worldwide, an annual defense budget exceeding $800 billion. The U.S. Department of Defense is the world’s single largest consumer of fossil fuels as an individual institution. It burns approximately 80-90 million barrels of oil per year. The U.S. military’s purpose is not solely to maintain dollar hegemony. However, it is widely acknowledged that military influence contributes to maintaining the dollar’s reserve currency status. A significant portion of this energy goes toward maintaining the dollar-based oil trade regime — the petrodollar.
Bitcoin protects a monetary system with no tanks, no aircraft carriers — just mathematics and electricity.
What Proof of Work Does
Proof of Work is not transaction processing. It is a security system protecting over $1 trillion in market capitalization. Attacking the network requires more energy than all honest miners combined spend. The laws of physics protect Bitcoin.
The existing monetary system is maintained by armies, police, courts, and prisons. Bitcoin is maintained by thermodynamics.
Stranded Energy
There is an interesting aspect to Bitcoin mining: the use of stranded energy.
Natural gas produced as a byproduct at oil drilling sites around the world is often simply flared — burned off — because building pipelines to transport it is not economical. About 150 billion cubic meters vanish into the air every year.
Bitcoin miners run generators on this waste gas. Simply flaring it releases unburned methane (with a greenhouse effect 80 times that of CO2 over a 20-year horizon), but fully combusting it in a generator is actually better for the environment. Crusoe Energy is already operating on this model.
Renewable energy follows a similar logic. Hydropower, wind, and solar face a timing mismatch between supply and demand. When the wind blows hard, it does not necessarily mean electricity is needed at that moment. Storage is difficult, so surplus power is wasted.
Mining rigs can run when power is abundant and shut down when demand is high. In Texas, Bitcoin mining facilities voluntarily reduce operations during summer peak hours, contributing to grid stability. According to ERCOT data, during the summer 2023 peak, over 95% of available capacity could be curtailed immediately.
This is why mining thrives in Iceland, Norway, and Paraguay — surplus hydroelectric energy can be converted to value. According to the BMC 2024 report, about 60% of Bitcoin mining uses renewable energy. (However, the BMC report is based on voluntary survey participation, and miners who did not participate are excluded, so the actual ratio could be lower.) That is higher than nearly every major industry.
Energy Use ≠ Energy Waste
Christmas lights: 6.6 TWh per year. Video streaming: 94 TWh. U.S. clothes dryers: 60 TWh. Nobody calls these “waste” because they provide value.
Then what about maintaining a monetary system that is censorship-resistant, seizure-resistant, and fixed in supply?
Turkey, Argentina, Lebanon, Nigeria. For people in these countries, Bitcoin is not speculation — it is survival. Telling people who watch helplessly as their government destroys their currency that Bitcoin is a “waste of energy” is a luxury only people in wealthy nations can afford.
Who Decides What’s “Waste”?
Behind “Bitcoin wastes energy” lies an assumption: that someone can decide which energy uses are acceptable and which are wasteful.
In a free market, the value of energy is determined by price. Miners buy electricity. They pay for it and provide network security in return. It is a voluntary transaction with no coercion.
The claim that government or media should judge which energy use is “worthwhile” is tantamount to denying spontaneous order and advocating central planning. Who gets to make the list of “non-wasteful” energy uses? This connects directly to the economic calculation problem. No institution can judge the needs and values of hundreds of millions of people.
Another point to consider in the environmental discussion is the e-waste problem from ASIC mining equipment. The average lifespan of a mining rig is 3-5 years, and hardware that becomes less efficient is discarded. This is one of the environmental challenges the Bitcoin ecosystem needs to address.
Ethereum transitioned to Proof of Stake (PoS) in 2022, reducing its energy consumption by over 99%. However, the Bitcoin community holds that physical energy expenditure is the only way to give a digital asset a real-world cost.
Bitcoin uses energy. True. It is the cost of maintaining the most secure monetary system in human history. Compared to the costs the fiat money system imposes on the world, 0.1% of global energy is cheap.