Here is another take using hourly wage, dispelling the myth that one simply has to work hard to become a billionaire. This shows that, if you started at age 15 working 72 hours per week with no vacation and no expenditures (i.e. laughingly simplistic) for ONLY $4200 per hour, you wouldn't become a billionaire until age 75! What a life! Thus it is clear - hard work alone cannot make a billionaire.