Possibly, my point was just that I consider the extreme form of wealth (aka billionaires or close to it) not the distinguishing feature of the upper class, the

Possibly, my point was just that I consider the extreme form of wealth (aka billionaires or close to it) not the distinguishing feature of the upper class, the lower limits of that class are much lower (relatively, it's obviously still not easy to achieve). I wouldn't consider myself middle class with capital gains north of the median income, but I don't have a clear cut criteria to apply here.