> but so far Bitcoin has been doing OK as a store of value
No, it hasn't. A store of value is supposed to be stable, it's about volatility. By that same reasoning you could argue that Apple or Tesla stock, or even the stock market in general, is a great store of value. But nobody would ever call it that, because it is far too volatile on a daily basis.
Trying to argue that a vague long-term uptrend in prices makes something a store of value is just more intellectually dishonest cope by cryptobros who are desperate to defend this useless technology.