Blockchain is great technology that can help people to do daily activities, and I believe one day the whole world will use blockchain. there are no more countries that prohibit cryptocurrency because everything is connected to blockchain technology. at the moment we can see many developers starting to introduce their platform that everyone needs.
Actually, blockchain technology is already used of many places in the world but not the whole there are some places that it doesn't use it. Cryptocurrency / Blockchain technology can collaborate but it doesn't mean that it can replace the things.