E/TX makes no sense for Bitcoin

<p>This is a bit of an odd episode, because I start off with a proof as to why measuring the "energy expenditure per transaction" does not make sense for Bitcoin, and end up talking about the tragedy of the commons, and the psychology behind deciding what it is worth spending energy on. &nbsp;Nevertheless, I'm going to break the habit of a decade, and talk about blockchain and environmentalism, even if it's in a somewhat oblique manner.</p>