Is Bitcoin's "Proof-of-Work" Really Useful? Explained Using A Simple Analogy

You’ve probably heard this statistic: The Bitcoin network consumes more electricity than entire countries. And I bet, just like me, you were shocked too.

Annual consumption of over 160 TWh is a number so large that it's simply hard to grasp. It's an amount of energy that could power all of Africa or the country of India for over a month, or run more than 10 million electric vehicles for over a year.

This colossal energy consumption leads to a single, frustrating, and unavoidable question:

What are the computers doing?

What is this "work"? Why is it so valuable that it justifies this immense power consumption? Is it performing complex calculations for humanity, like finding new medicine to cure diseases, or modelling climate change?

The answer, tragically, is NO.

The "work" in Bitcoin's "Proof-of-Work" is a race to find a random number. There’s nothing more to it.

Put simply, it’s like an energy-wasting competition. Its only purpose is to prove that the winner, very likely, wasted the most energy, and hence deserves the block reward. Then, the contest for the next block begins, and so on.

Is this energy consumption, this work, sensible? If your answer is NO, you’re actually spot on. It was never designed to be sensible.

As an engineer, the sheer, structural pointlessness of this system is what drove me to write The Bucket-Water Analogy. The jargon used in this field is quite confusing, but the underlying mechanism is pretty simple.

Let's first understand what Bitcoin's proof-of-work is, and why it is so wasteful.

The "Work" That Does Nothing

To understand why this is so catastrophic, you must realize that cryptocurrency is built from three separate, independent technologies.

1. Digital Currency: Money that exists electronically and can be transferred over the mobile network or internet. You use this every day with your bank account, credit card, or apps like PayPal. It's efficient, fast, and does not require a blockchain or a distributed consensus.
2. Blockchain: A decentralized, unchangeable ledger. This technology is genuinely innovative for things like supply chain tracking or property records. It does not require wasteful mining. It can be secured by other methods, like proof-of-stake, which is 99.95% more energy-efficient, or proof-of-history, proof-of-authority, etc.
3. Consensus mechanism: This allows the blockchain network to decide who adds the next block, and hence, gets the block reward. A distributed consensus, in essence, is one where the participants decide the winner of the next block reward. Such a consensus, when based on proof-of-work (PoW), therefore, is a system designed specifically to reward waste or—as crypto advocates prefer to call it—energy expenditure.

Bitcoin’s "innovation" was to combine these three while using the most wasteful, catastrophic consensus mechanism possible.

The "work" (guessing numbers) does not:

• Secure your transaction (cryptography does that).
• Process the transaction (validation by multiple network nodes does that).
• Create any value for society. Instead, it only wastes valuable resources.

The trillions of calculations are just the "noise" of the mining lottery, like a million people pointlessly digging holes for one person to find a coin. 

Let's understand this pointlessness through a story.

The Analogy of Bucket-Water Exchange

Imagine a small island economy, complete with people from all professions (from farmers, cobblers, and blacksmiths to doctors, teachers, and computer scientists).

On this island lives an unemployed man named Anmol. He decides to "create" a job. He sets up two buckets—one full of water, one empty—and begins to meticulously transfer the water from one bucket to the other using a mug. He does this all day, every day.

He then seeks payment for his "work." No one agrees. He finally reaches out to the town's central banker and demands to be paid by printing new money! The banker naturally refuses, saying "You haven't done anything. You've produced no food, built no shelter, taught no one. You've just... moved water. That isn't economic work".

This conversation goes viral and gets the attention of a computer scientist, Dr. Priya. She asks Anmol for help with an experiment: "What if we make your work valuable?"

Together, they create a new cryptocurrency called the "Bucket Water Exchange Coin" (BWEC).

1. They create a digital token: A simple, secure digital currency.
2. They build a blockchain: A public, decentralized ledger so everyone can track who owns which coins.
3. They add the "Work": A contest that decides who gets to add the next block of transactions to the blockchain ledger. The person who adds the block is rewarded with new BWEC coins, and will be chosen among those who move the most water between buckets, and the contest restarts every ten minutes. The more water they move, the higher their probability of being chosen.

What starts as satire becomes a "horrible success."

Others join the "BWEC mining" contest. An arms race begins. Engineers are hired to develop faster pouring techniques. Soon, industrial-scale "BWEC mining farms" emerge—warehouses filled with thousands of people, 24/7, all pointlessly moving water between buckets.

The island's economy distorts. It becomes more profitable to move water than to farm, build, or teach. A massive 10% of the island's workforce is now doing this provably pointless task, all to "secure" a currency system that, through its very design, creates this insecurity.

This is a perfect 1:1 analogy for Bitcoin's Proof-of-Work.

Bitcoin mining simply replaces the pointless human labor of moving water with the pointless computational effort of guessing numbers. The energy waste isn't a bug; it's the core feature.

The Economic Catastrophe: When Waste Pays More Than Work

This is where the true damage becomes clear. We have created a system where pointless activity has become more profitable than productive work.

The Bucket-Water Analogy analyses the profitability-per-kilowatt-hour for different activities. The higher the bitcoin price, the more perverse the incentives:

• Bitcoin Mining: When Bitcoin price was around $100,000, miners generated  $0.20 of average profit for every kilowatt-hour (kWh) of electricity consumed. At current bitcoin prices, the profit is negative, i.e., 15% to 20% miners are paying $13,000 to $19,000 more to mine a bitcoin than they earn by selling one, mainly because the mining costs haven't dropped after the bitcoin prices fell since November 2025.
• Note: These are the average values. The actual profits are higher for energy-efficient miners with access to cheap electricity.
• Green Hydrogen Production: A vital technology for clean energy transition, currently generates a profit of ~$0.127 per kWh. The 160 TWh energy lost on bitcoin could have generated to roughly 3 billion kg of green hydrogen and 24 billion kg of oxygen. This is detailed in my post as well as the book.
• Aluminum Production: An average business producing this critical industrial material can reach a profit of ~$0.15 per kWh.
• Taxi Driving: Taxi drivers in US have monthly operational costs (loan instalments, maintenance, repair, and fuel costs) of around $2000, and they earn roughly $1/km in fare charge. 
• Assuming no idle driving (ideal case), and if taxi drivers earn fare for 3000 km per month, they make a profit of $0.425 per kWh.
• If we assume even 20% of 3000 km as idle driving, which is practical, this profit drops to less than half, at ~$0.16/kWh.

The Result

An electrical engineer in a developing nation can make $30,000/year designing power grids for rural villages or $100,000/year maintaining Bitcoin mining rigs that waste power.

Nations like Bhutan and Kazakhstan are choosing to divert their precious hydroelectric and fossil fuel energy, respectively, to mining Bitcoin instead of building factories, powering cloud computing and data centers, or simply selling energy to other countries, for example, through green hydrogen production.

We are literally incentivizing the world to abandon productive industries in favor of pointless waste.

The Environmental Crime (It's Worse Than You Think)

This economic distortion is funded by an environmental crime of staggering proportions. The numbers speak for themselves.

1. The Carbon Crime:

Bitcoin emits ~84 million tons of CO₂ annually. This is equivalent to the emissions of ~17 million cars driven for a year. It consumes over 0.04% of humanity's entire remaining carbon budget. For what? 7 transactions per second?

If we divide this annual emission by average annual Layer 1 (L1) transactions (~220 million), we find that each transaction emits over 380 kg of CO₂. At 7 L1 transactions per second, this amounts to over two and a half tons of CO₂ emitted every second! 

Let's compare this with the emissions of burning a full-grown tree. Considering that each kg of wood emits 2 kg of CO₂ when burned, and taking average weight of full grown trees as 3 tons, meaning it would emit 6 tons of CO₂ when burned. The bitcoin network emits more CO₂ than burning a full grown tree every three seconds!

2. The Water Crime:

This is the crisis hidden in plain sight. Mining rigs need cooling, often with water. Even solar panels need to be cooled to maximize their energy yield, especially during summer. Water stored in dams has to be displaced to convert it into hydropower. Displaced water spreads over a wider area, which means, it evaporates more rapidly than the water stored in a dam.

This means, the water footprint adds up even if Bitcoin mining is seemingly green on the top. Bitcoin's annual water footprint is estimated to be over 2 trillion liters.

As an example, let's look at the water loss due to bitcoin mining activity near Seneca Lake, NY, US. For every 1 km² of area, around 15 million liters of additional water is lost to evaporation every day. This water is more than enough to fulfill the daily requirement of 4 million people or young trees, or roughly 800,000 full-grown trees.

And that's just the water loss calculation for a single bitcoin mining facility. 

On a global scale, water required for bitcoin mining is mostly being drawn from water-stressed regions like Texas, Iran, and Kazakhstan.

3. The "Renewable Energy” Lie:

The most common defense is that mining uses "green" energy. This is the most cynical lie of all.

• It's Still Waste: Wasting 100 TWh of clean solar power is still wasting 100 TWh. That energy could have displaced a coal plant or powered 10 million homes, use cases that actually help the climate.
• It's Often Not Green: Miners actively restart defunct coal and gas plants only because they need cheap power. This directly increases emissions.

Why Can't Bitcoin Just Change?

This is the final, tragic piece of the puzzle. If this waste is so obvious, why not just... stop? Why not change to a 99.95% more efficient system like Proof-of-Stake, as Ethereum did?

The answer: Bitcoin is trapped by its own success.

1. The Mining Industrial Complex:

There is over $20 billion invested in specialized ASIC mining hardware.

ASICs, by design, are application-specific. If an ASIC was designed for bitcoin mining, it can do nothing else but mine Bitcoin.

Switching to an energy-efficient alternative like proof-of-stake would instantly scrap this entire $20 billion industry. The miners who control the network will never allow this.

2. The "Energy = Value" Narrative

For years, Bitcoin's defenders have built its entire value proposition on the idea that "it's valuable because it costs so much energy to create." To admit this energy is pointless waste would be to admit the entire "digital gold" narrative is a fraud. This creates an ideological lock-in.

Bitcoin cannot change because the very people who control it are the ones profiting most from its destructive, wasteful design.

The Real Work Is Waiting

While we waste nation-scale energy on a digital lottery, the real work that needs doing is being starved of resources.

• 1.3 billion adults still lack a bank account.
• 2 billion people lack access to clean drinking water.
• Over 700 million people lack access to electricity.
• And, as every bitcoin miner knows well, the planet is facing an accelerating climate crisis.

Every engineer optimizing a mining rig is one not developing renewable energy. Every dollar invested in Bitcoin is one not funding a hospital, a school, or a real business.

The choice isn't between old finance and new finance. The choice is between necessary, meaningful work and needless, pointless waste.

Bitcoin, with its proof-of-work consensus mechanism, is the most spectacular, most resource-hungry, and the most absurd example of economic waste in human history.

It's an entire global industry built on work as pointless as moving water between buckets. And it's time we stopped.

I'm sure you have something to add. Please let me know in the comments.

This post summarizes the core argument of the book The Bucket-Water Analogy.

If you want to see the full data, the step-by-step breakdown of the "BWEC" experiment, and the complete economic case against the biggest energy waste in modern history, read the eBook on Amazon Kindle.

If you want a full, documented history of the failed promises of crypto, its political capture, and the proof that it serves as a global wealth extraction machine, read The Bitcoin Pyramid.

Kindle Unlimited subscribers can read both eBooks for Free!!