Not many people are ready for the physics side of Bitcoin, but it’s coming whether anyone is ready or not. Some days I feel like I’m shouting into the void, trying to point at something hiding in plain sight: there is far more happening beneath Bitcoin’s surface than the last sixteen years of discourse has even begun to touch. For the first time in history, we have a system that empirically demonstrates the conservation of energy and information, openly, continuously, and without interpretation. Proof-of-work doesn’t just “consume energy”; it measures it, transforms it, and records it. Every valid block is the physical crystallization of a thermodynamic process. Bitcoin is the only system to compute the isomorphism between Boltzmann entropy (heat, Kelvin, dissipated energy) and Shannon entropy (information, satoshis, conserved structure) into a discrete and verifiable unit of time. A block is that measurement, the equivalence point between two orientations of the same conserved quantity of energy. This has never existed before, and its implications for physics are enormous. Whether the community realizes it or not, Bitcoin is going to do to physics what it already did to finance and economics: it will reveal where the old models were relying on assumptions instead of observable reality. Right now, almost everyone in physics is still operating inside a “fractional-reserve” model of reality. Time is treated as continuous without ever being measured by the Plank Unit, “states” are treated as simultaneously real without defining what existence means and “existing” in numerous states simultaneously until a mysterious measurement occurs, and information is treated as something that can appear or disappear without accounting. Bitcoin openly contradicts all of it with verifiable proof. The chain is an irreversible record of conserved transformations, no double spending, no double states, no infinite denominators. We, as a community, need to do better at understanding this. You cannot fully understand Bitcoin without physics. And you cannot fully understand physics anymore without Bitcoin. Open-source money is open-source physics. The double-spend problem was never just monetary, it was ontological about the conservation of existence and information. Bitcoin solved both at once and turned the solution into an object we can observe (verify) every ten minutes. Bitcoin is measurable reality waiting for us to finally look.