It is impossible to make billions of dollars in an ethical way (short of inheriting it from someone who made it in an unethical way). First of all, just lookin

It is impossible to make billions of dollars in an ethical way (short of inheriting it from someone who made it in an unethical way). First of all, just looking at empirical evidence, all the existing billionaires—every single one—made their billions through some form of exploitation. Second of all, you can't make billions without going through millions for a good while—and once you have enough money to live comfortably for the rest of your life (which I'm not going to try to put an exact number on, but I think it's fair to say it's somewhere in the millions), it is unethical not to find ways to use the rest of it to improve the lives of the rest of the people on Earth.