Comment by cellis

I think there's only one way to earn passive income reliably at this point. And it's not going to be easy ( otherwise, everyone on HN would already be doing it! ). Here it is:

  1) Learn how to interview for top tier companies in your free time. 
  2) Interview at those companies. 
  3) Work at those companies really hard, make $300k/yr. 
  4) Work for 10 years, save 200k/yr. 
  5) Invest in ? 
  6) You've now achieved purely passive income on a $2million principle. 

I haven't done it, but I know people who have.