I'm not so sure about that unless the country itself or government recognized bitcoin or if it will be teach on a learning institution. Mass adoption will come but I doubt that all people will ever use it, not all people can even own a cellphone at least or even buy a hardware wallet.
Change is indeed a slow process and it depends on the government if they are going to accept bitcoin on their country and let their people adopt it. It will take a lot of years to make it, its possible but difficult to achieve because you can't easily say that people are interested unless they can easily get some benefits from it. Actually most of them are still reluctant when it comes to technology.