What will happen if only the mega rich can access a new stem cell treatment that makes one physically younger and potentially live a hundred or more years longer?

This isn’t so far fetched. In a way it has already happened in the past/happens in the present. Some people in the world reach “old age” at 30. But, that is more about life expectancy, than true old age. Given the right environment normal people from diverse cultures will probably live to around 70 or older.

If the mega rich started living hundreds of years longer than normal, it would certainly have an economic impact, a social impact, etc.

What do you think the world would look like if this comes to pass?