I have no need to be the richest man on Earth. Just enough to keep my family living comfortably is quite enough. Sure, I am convinced Tesla will become worth quite a lot over time, but putting my family life on hold in order to shove every single dollar of my income into buying $TSLA is not my idea of living in comfort.
And why should I? When you understand what Elon Musk is doing, you know that his early supporters deserve the wealth they crave, but you will also notice that the effect of that is not just a ripple in the global economy, but rather the revolution of creating the Muskonomy!