Cowrie shells are one of the oldest forms of currency in existence. Would you say they are therefore exactly as useful as US dollars? I wouldn’t, because you can buy things with US dollars, whereas right now you can’t with cowrie shells…unless you pawn them for dollars first.
It’s true currency has no intrinisic value, just what people agree to treat it has having…but the thing is, people agree to treat it as having value. If nothing else there is a government that promises to honor it for taxes for the foreseeable future, making it useful for that. Blockchain currency du jour has no such promise, as the very fact that it’s du jour would indicate.
In other words, what you’re saying would only be true if you believe social constructs can’t be more or less useful, which is a very nonsense position for anyone who lives in a society.
