It would take longer than human history to get as rich as Elon Musk.

If you went back in time to the year 100,000 BC, early homosapiens are beginning to migrate out of Africa and large parts of Europe are under about a kilometre of snow and ice. There are about 90,000 years left in the ice age.

If you are immortal and begin saving $10,000 every single day, without spending any of it, by the time it's 2025 you still won't have the same net worth as Elon fucking Musk.