Having 0.1 BTC is really good enough for investment, actually even smaller amount are good at investing, once you have goal and you already reached that one, you should have other gold which is better than the old one, always make your goal higher whenever you reached the current one. We should not stop dreaming because whenever we dream, it makes it motivate to get that thing, our eagerness will push us to do so.
That is why I really want to invest my money, especially for a long term, it is very profitable, if you have an extra money, better to spend it on investment instead of spending it on some other things.
I had read the story of the boy before and that is really inspirational, hoping that all of us have $1000 in our pocket at the age of 12 lol, imagine 7 years of experience and he became millionaire, hoping that I could be like him someday.