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.
I think that what can increase the adoption of Bitcoin, and make people in remote areas to know about it and use it is when it's used to pay for transactions on day to day basis, when you can walk into a small shop and make payments with Bitcoin. Just merely telling and educating people about the advantages of Bitcoin as a digital cash is not enough if they can't use it. First a user needs a smart phone and internet connection, then you need to lecture them about the Blockchain technology, that is a handful for many people in the rural areas that are not literate.
The best and most effective way to increase Bitcoin adoption is when governments adopts it, and people begins to see it as an alternative currency in their countries, we know that it's not possible for now. This is the reason why majority of people that hodl Bitcoin, is for investment purposes.