A good number of people already know about bitcoin, but the total percentage of people using/owning bitcoin worldwide is still very small I don't have the numbers to back this up, but I'm quite sure about this). We are early adopters, assuming that bitcoin will be successful in the end. Always take note of that- even though I'm extremely bullish on bitcoin and cryptocurrencies in general, the chance of these succeeding is not 100%. That's why it's always advised to speculate or 'invest' wisely.