Energy claims framing

Structural facts that hold regardless of the year's numbers: (1) Bitcoin's energy use is driven by mining revenue (subsidy + fees), because rational miners spend up to expected reward — it is not driven by transaction count, user count, or price directly. (2) Energy secures the chain's history and issuance, not individual transactions, so "energy per transaction" divides an unrelated numerator by an unrelated denominator; adding or removing transactions would not change consumption, and a block's energy also secures every block beneath it and all off-chain activity that settles to it. (3) All consumption figures are model estimates (e.g., Cambridge's CBECI publishes explicit lower/upper bounds), not measurements. Any absolute number — TWh, country comparisons, emission shares — drifts and must carry an asOf date.

Nuance: These structural points do not settle the normative debate over whether the expenditure is worthwhile — that is claims/ territory. They only constrain which quantitative comparisons are coherent.

Common misstatements:

• "One Bitcoin transaction uses as much energy as X households." — Category error: consumption does not scale with transactions, and one on-chain transaction can settle arbitrarily many payments.
• "Bitcoin's energy use grows with adoption/price without limit." — It is bounded by miner revenue; the subsidy component halves on schedule.
• Quoting a fixed "Bitcoin uses N TWh" without a date or a source's bounds. — Every such figure is a dated model estimate with wide uncertainty.