anonymouslives: "What is your best personal financial advice for people who make under $100,000 per year?",
thisisbillgates: "Invest in your education.". Trying to digest this bit when dropping-off to do startups is in fashion.
Note that he didn't say "go to school". If you don't know much about startups, dropping out to do one (as Gates did) might be considered an investment in your education. So might reading widely, or taking online courses, or of course paying a lot of money to attend a 4-year university.
Quote from Reddit: "I feel like he is probably one of the least qualified people to answer this question. When was the last time Bill Gates made less than $100,000 per year?"
Bill Gate's Response: "I never went for a big salary but your basic point is correct."
Indeed, this probably isn't the best question to ask Bill Gates.
