You will not get rich by buying $100 worth of Bitcoin
Don't get me wrong, it's great that people are discovering bitcoin, but there seems to be a lot of people buying small quantities and expecting to buy a lambo in a year or two.
Bitcoin is not a get rich quick scheme. Some people, myself included, have indeed made quite a lot of money, but that's more often than not a happy side effect of having supported bitcoin for many years and being fascinated with the concept.
By all means, buy bitcoin, experiment with Bitcoin and pay people with Bitcoin, but don't have unrealistic expectations about what your 0.009 BTC might be worth in a few years