I don’t think this will happen. Look at Steve Jobs. All his wealth didn’t get him past his fifties. Also, upper income white people are dying earlier, resulting in a dip in the life expectancy in this country due to drugs and suicides.
If people do create the means to extend longetiviy, especially if it involves youthful appearance, I’m sure those in the entertainment industry will be first to avail themselves of it, even moreso than tech billionaires.