Yeah we cannot make a statement with cent percent surety that bitcoin will be known by every people. As described we can expect a big increase in the users. Also at least most of the technology related people gets an awareness about the existence of bitcoin as well digital currency. Right now there are people who are in a career related to P2P, but don't have any small idea about bitcoin.
They may have not ever experienced it because once they aware about the importance of bitcoin they will never dislike bitcoin, they will even appreciate bitcoin after come across it.
I too strongly believe bitcoin will be adopted by 60% to 80% of world population in the year 2022.
those who haven't tried bitcoin yet working on the internet for quite awhile already may somehow be hesitant to try btc because of the media publication which they say isn't stable and they can lose money with it. blame it to the media. but soon it will be too late for them when btc price goes super high which almost everyone are wanting to own even just 1btc.