If you're in just for the profit, you're NGMI. I prefer a future wherein I won't have to convert my bitcoin to fiat, with little inflation, than live rich in a world with crap money.
The
adoption of Bitcoin in comparisons with Internet users, world population show that how fast Bitcoin adoption is.
I advice you to be very careful when reading about the adoption and the total users. Nobody can know such thing with certainty, it's like asking how many people possess gold. I doubt you can even approach that number.