Depends on the block height you choose to measure currently due to supply schedule. At terminal supply (Block 6,930,000 onward), joules per satoshi becomes invariant.

I've had some time to think about this and I will not resort to arguing on the internet because it does not benefit me, but I do want to express some thoughts about this exchange. Firstly, I have often been an advocate for measuring bitcoin in things other than dollars. Nothing in my OP stated that I was measuring in fiat. I generally measure bitcoin in gold. Last I checked it was around 14oz. Every market good holds relative value to every other good; this is a fundamental axiom of austrian economics. As a result, it doesn't matter what one uses to price bitcoin as long as it works for that person. From my perspective one of the biggest issues slowing bitcoin adoption today is that normies do not care or do not understand it. Complex theories about quantum physics, the nature of time, and measuring bitcoin in vibrating electrons might be fun or interesting, but I am not convinced that they are helpful in any material sense. Thought experiments (as contrasted from empirical experiments) like this one seem likely to confuse people and move them further from adoption. Maybe you don't care about adoption, but that is my goal. If we have different goals that's fine. If your goal is also adoption, it's important to make bitcoin more accessable for those who want to learn about it and use it. For example, if the question "How much is 1BTC in joules?" cannot be answered with a round number, which can then be converted into USD, EUR, gold, rent, or strawberries then I don't see any value in discussing it. Bitcoiners have developed a noticable tendency towards failing to meet people where they are at. Instead they often get hyperfixated on topics which don't matter to a vast majority of the working world. Maybe what you are saying is useful to someone, but frankly, the more we talk, the more I doubt that is the case. This is the end of my engagement with this topic over nostr. If we meet face to face one day maybe we can continue the conversation. I wish you all the best 🤙