Legendary investor Tim Draper is confident that in five years all will use crypto currency. According to Draper, the technological shift that we can observe now will be more significant than the transition from the Stone Age to the Bronze Age. Answering the question about how he sees the current situation in comparison with the period when he invested in the technologies of web 1.0 and 2.0, he replied that web technologies and transformed the concept of information, while blocking has the potential to transform almost all industries, including government services.
I do not know the person whose post you are quoting but I cam guarantee you that in my country all people will not be using bitcoins even in nest 100 years. I am sure this is common for all developing countries. The reason being that there are no resources or infrastructure required for this. People have access to smartphones (as they have become cheap with time) but internet is not available to everyone. Also, people are not much educated or financially aware here. I do not see this changing unless government takes some concrete steps in this direction.