To me i think there are some part of the world that still don't know anything about Bitcoin, because there are people in USA, UK, Australia, Canada, China,etc. even in Nigeria there are people that don't know anything about Bitcoin, they always think that Bitcoin is a scam, but people that know about it are making thousand of Dollars,($) I think they don't know that we are in a digital world now.
That's basically how the whole system is designed, you don't expect everyone in the whole to know about Bitcoin, I mean not everyone is open minded or even literate enough to understand that there is actually something called Bitcoin and people use it to transact and also as investment that could possibly earn them tangible returns in the future. Okay I could go religious and even state a claim about the christian faith that is actually being preached and spread to every corner of earth but yet some places still don't know about JESUS and even Christianity as a whole.
Most especially that our government itself does not promote bitcoin, then more chances are those people who have no access on the internet are probably unaware that there is bitcoin that exists. Or most likely, they have heard about the term bitcoin but are not interested enough to understand it more since they all think that bitcoin does not bring any essence to the life of an individual, not realizing that bitcoin could be our future when fiat itself will end up depreciating and will lose its value in the long run.