I would say that the amount of people that use Bitcoin probably numbers among 1-2 million total, and yes, we do have a long way to go.
The thing is Bitcoin, as it is right now, is still too technical for a lot of people, and a lot of the things we find obvious or easy simply aren't easy or simple to a majority of other people. I know it sounds dumb, but that's how it is.
My theory is assume that 25% of /r/bitcoin users also use this board, and assume this board is ~30%-45% representative of the total population of Bitcoin (e.i. user number multiplied by ~0.75 to account for multiple accounts) and then assume it counts for ~40% of the entire count of users, multiply the numbers and get your answer.
I also pulled that theory out of my ass so no guarantee is means shit.