Let me put it in perspective:

If you own one Bitcoin, that means there can only be 20,999,998 other people in the world who have more Bitcoin than you. Given that there are many people who own thousands of bitcoins, that means there will be significantly less people who can ever have more money than you.

I don't know exactly how wealthy, but if Bitcoin ownership becomes a big thing for tech, where companies like Apple, Google, and others want to hold onto Bitcoin as bragging rights (we own 12% of all Bitcoin, look how cool we are), then Bitcoin won't follow pricing rates associated with a gold market cap or anything, it will be its own economic ecosystem, and it will be HUGE.