<prompt> Human: Im studying to be a physician currently, and will finish medical school with no student loans, and have a hypothetical situation that Im curious as to how it works. Lets say at 35 I put 200,000 that Ive saved down and continue to contribute 10,000 every month 120,000 a year. This stands for 35 years until I plan on retiring. If I get a 8-10 return, its telling me at the end of 35 years I have dozens of millions simply from interest compiling and whatnot. I get how the math works... but why does this seem too good to be true? Whats the reality of this, given that the numbers stand? Do most high earners do something of the sort?  <response>: Nothing. This is true. If you are earning a 10 interest rate, the money you have will double every 7 years, and youll have 40 Million by the time you are 70. If you are earning an 8 interest rate, the money you have will double every 9 years, and youll have 25 Million by the time you are 70. Maintaining these types of returns is not totally realistic as your portfolio will become less risky throughout the years, but youll still have a significant chunk of cash. 