B-ank · Briefing 04

What Bitcoin Is

Bitcoin’s Energy Use, in Context

Bitcoin’s energy consumption is its most frequently criticized feature. A clear-eyed assessment requires separating what is true from what is rhetorical — and understanding why the energy use is structural rather than incidental.

Black and white image of Chris Vaneman, President of B-ank

By Chris Vaneman · Principal, B-ank

Bitcoin research full-time since 2020

Published

September 3, 2026

Last Reviewed

September 29, 2026

Summary

Bitcoin’s energy use is real, measurable, and integral to its security, unlike that of the legacy financial system. It is also self-regulating, comparable to — or below — the traditional financial system’s, and increasingly drawn from otherwise-wasted energy sources. The honest case does not require denying the consumption, yet reveals a heightened awareness of the improved efficiencies this protocol delivers.

01

The energy is the security

Bitcoin’s network is secured by the computational work of mining. That work — and the energy it consumes — is what makes the ledger prohibitively expensive to attack or alter. Reducing the energy would reduce the security. This is the essential point often missed: the energy expenditure is not waste, but the mechanism that makes the network trustworthy without a central authority.

02

The consumption is self-regulating

Mining is profitable only where the value of the reward exceeds the cost of energy. Miners therefore add or remove capacity in response to price, and the network consumes only as much energy as its value justifies. The consumption is a function of the network’s worth, not an uncontrolled appetite.

03

Context and comparison

  • Scale. Bitcoin uses an estimated 155–170 TWh per year — under 0.6% of global electricity, and comparable to a mid-sized country. This figure is transparent and independently verifiable.
  • Comparison. The traditional financial system’s energy footprint is estimated between roughly 260 TWh and several thousand TWh depending on what is included — a range so wide because, unlike Bitcoin, the system is not transparently measurable.
  • Sourcing. Because miners seek the cheapest power and can operate anywhere, they increasingly use energy that would otherwise be wasted — flared gas, curtailed renewables, and landfill methane — and can serve as flexible load that supports electrical grids.
04

The honest position

Bitcoin does not yet perform the full range of functions the financial system provides, so a direct comparison is imperfect. But the argument that Bitcoin’s energy use is uniquely wasteful does not survive scrutiny: the consumption is transparent, purposeful, self-limiting, and increasingly sourced from surplus. The case for Bitcoin does not depend on dismissing the energy question — it depends on answering it accurately.

The B-ank View

We neither apologize for nor minimize Bitcoin’s energy use. We explain it: a transparent, self-regulating expenditure that secures the network, compares favorably to the alternative, and can be sourced from energy that would otherwise be lost.

–  Chris Vaneman, B-ank

Educational material. Not investment, legal, or tax advice.