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.
Every country in the world knows more or less about Bitcoin. But show me a country where all the people of that country know about Bitcoin, I don't think there is any such country. The name Bitcoin is probably known by the governments of all countries, more or less by the people of all countries. Currently people between 10 years to 45 years are familiar with modern technology, most of them are using Bitcoin and know about Bitcoin. I live in an underdeveloped South Asian country where most of the people don't know about Bitcoin, even a third of the people in the country have never even heard of Bitcoin. The digital world is advancing, people are now showing interest in digital coins. Soon Bitcoin will become widespread.