This graph shows the wealth distribution in red. Note that the visible red line is one pixel wide and disappears everywhere else - this is the key point: essentially the entire US population is in that first bar. The graph is drawn with the scale of 1 pixel = $100 million in the X axis, and 1 pixel = 1 million people in the Y axis. Away from the origin, the red line is invisible - less than 1/1000 of a pixel tall since so few people have more than $100 million dollars. It's striking just how much money Bill Gates has; even $100 million is negligible in comparison.
Since the median US household wealth is about $100,000, half the population is crammed into a microscopic red line 1/1000 of a pixel wide. (The line would be narrower than the wavelength of light so it would be literally invisible). And it turns out the 1-pixel-wide red line isn't just the "99%", but the 99.999%. I hypothesize this is why even many millionaires don't feel rich.