There is no way BTC goes to $1 million such that the holders of 100+ BTC go to $100 millionaires and maintain control over their wealth.

Society controls large wealth. This is why large wealth colludes to control government. Thus if that $1 million/BTC comes true, you BTC100 holders either become corrupt (join in the capture of the government) or you give up control of your wealth to the socialism.

Thus the goal of a more anonymous altcoin (since Bitcoin isn't anonymous at all) is not to make large holders anonymous, rather to make the small and medium holders anonymous. And thus large holders also can keep a small portion anonymous. This is their diversification, get of tax hell plan.