for one they don't really make sense, humans have developed specifically for tasks we don't really need anymore (like throwing far and hard, outrunning prey by having more stamina, etc.) so creating robots that are tailored for actual relevant tasks just has a higher priority.

additionally the uncanny valley effect sets the bar for a humanoid robot that's accepted by society quite high

the only real market would be for super rich people that don't mind buying a ridiculously overprized robot that's only real advantage is that it can use tools made for humans, they won't be cheap even mass produced because they're way too complicated

scandinavian countries like norway are probably the best bet with virtually only the weather as a relevant downside for some people

it's still not really viable as a currency because of the wild swings in it's value, if it doesn't make the jump from investment option that bets on other people thinking they can eventually sell it for more it will keep being a thinly veiled scam