You were born 300,000 years ago and you start a thriving rock trading business.
I mean you really, really are good at it. A pioneer in your field. A rockstar, if you will. You can even say you pulled yourself up by your bootstraps since your dad was a literal monkey.
You make an astounding $1 million dollars a year and use your newfound wealth to buy immortality from the immortality fairy.
You continue crushing it, making an average of $1 million a year for every year for the next 300,000 years.
It is now the year 2022.
Imagine your surprise when you hear that some dude named Elon Musk somehow has more money than you.
(Math for fun. Elon's peak net worth was 340bil. 340bil divided by 300k is 1.133mil.)