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.
Well, any part of the world where there is an access to the Internet it's people should have at least heard of the word cryptocurrency if not Bitcoin. In these countries you have mentioned, they are actually very familiar with Bitcoin and cryptocurrency but most times due to give restrictions and other regulations they have little interest in Bitcoin. The world is growing and developing very fast so new technology are flooding the internet daily.
Digital currency are next generation form of currency, as most countries are now having there own stable coins pegged to their fiat currency. The reason why most countries still restrict or are against crypto is because of the fear they have about it. Yes crypto currency was created to easy life just as every technology was created for. But some others have seen it as a way to commit criminal acts. Giving them bad names.