Pierre Noizat – Energy: The Flip Side of Money

What if the deepest way to understand Bitcoin is through the lens of physics? On the BTC Prague stage, I explored how energy and entropy are not just scientific concepts — they are the hidden architecture of money itself, and why Bitcoin is the only monetary system that takes this seriously.

Money Is Energy

Let me start with something I think most people instinctively understand but rarely articulate: money represents energy. When you receive a salary, you’re being compensated for your work — and your work is a flow of energy over time. This isn’t just true at the individual level. If you look at the data, energy use and GDP are almost perfectly correlated across entire economies. At any given moment, the money circulating in a system maps directly onto the energy that system consumes and produces.

Fiat money complicates this over time, of course. Inflation dilutes it. The representation weakens. But the underlying relationship remains real.

Entropy: The Other Side of the Equation

Beyond energy, there’s a concept that’s harder to grasp but equally important: entropy. Entropy is a measure of uncertainty — the disorder in your environment, your lack of information about what comes next. Unlike energy, entropy is observer-dependent. And crucially, unlike energy, it can be copied.

That difference changes everything. If I change a law in a country, every entrepreneur in that country knows it instantly. Information spreads at zero marginal cost. That’s why economic freedom — which is essentially a measure of reduced entropy for entrepreneurs — correlates with GDP even more strongly than energy use does, and the relationship is convex, not linear.

Reducing entropy creates wealth. A GPS saves you fuel by eliminating uncertainty about your route. A monetary system reduces the entropy of trade by putting prices on goods and making exchange possible without barter. Knowledge is entropy reduction — and entropy reduction releases new productive energy.

Three Minds Who Built the Framework

The science of energy rests on three foundational thinkers. Antoine Lavoisier gave us the first principle: nothing is created, nothing is lost, everything is transformed. Rudolf Clausius gave us the second principle and the concept of entropy: disorder tends to increase unless you spend energy to reduce it. And Ilya Prigogine, Nobel laureate in 1977, gave us the third principle: an open system receiving energy will self-organize to maximize its flow of energy. That last principle explains both Darwinian evolution and technological progress — they are two expressions of the same underlying dynamic.

Two Kinds of Money

With this framework in mind, I see two components to the value of any money: energy value and social value. Energy value comes from what it costs to issue the money. Social value comes from the size of the ecosystem using it.

Proof-of-stake coins like Ethereum have social value but zero energy value. Fiat money carries a promise of energy — borrowers pledge their future work to repay loans — but it’s a promise, not a proof. Bitcoin is proof-of-energy money. The energy is real, spent, irreversible. That’s not a bug or a waste. It’s precisely what gives Bitcoin its monetary integrity.

If you want to go deeper on all of this, the book covers it in full. The conversation about energy and money is one I find endlessly fascinating — and I believe it’s essential to understanding why Bitcoin is not just a better currency, but a fundamentally different kind of money.