Norway also has trillions of dollars in its sovereign wealth fund. Like they could all stop working tomorrow and be fine for a couple of years living off their national savings account.
Norway is far richer than US on a per-capita basis. Also, US mean wealth is a lot higher than its median wealth (which is what really counts). Any dirt-poor country could print money to give a few trillion dollars of nominal wealth to a single dictator and achieve a high mean wealth but everyone else in the country would be dirt poor.