Yeah come on it should be pretty simple to explain why Bitcoin has value. It's because there is demand for it, for whatever reason. A "scarcity theory of value" feels like someone hamfisted the labor theory of value into the cryptocurrency space. No, even if labor is scarce and precious then making beanie babies for which there is basically zero demand (I assume) is still producing no value.

I'd say most of the value of Bitcoin comes from the ability to do payments that are not possible in the current legal system. Some of them may be illegal. Some of them might be genuinely useful like in El Salvador.