For all the fantasy here, let me remind you doing a PhD at an early age is one of the worst things you can do to your financial security (CS Ph.D being a major exception). It does not teach any employable skills, leads to a very high level of depression/anxiety compared to regular jobs and creates a huge opportunity cost where you miss out saving money early that has true compounding capability. The 2019 Nature survey has more information
https://www.nature.com/articles/d41586-019-03459-7