If we arise the idea of paying everything via electronic devices, we must also take into account "Least Developed" and fourth world countries where modern technologies aren't developed properly.
Initially Bitcoin only growing rapidly in developed countries, but now there is everywhere, this progress is running normally.
"Onelife, onecoin" very successful in Africa, though wrapped in HYIP. In a third country/fourth, all understanding bitcoin begins with gathering business/member get member, and doesn't require online (only a few people who should be online), and as a result almost all of them can buy supplies pc/internet on their own. So all will automatically fill, we shouldn't be confused, They are in third country/fourth that will find answers themselves.
There are still places that is unreached by Bitcoin. Even in the main city of my country, seldom have known bitcoin and more rare are the people who actually use it. One of the reason is that, Bitcoin are used mainly for trading and profit earning, while it would spread faster if used by merchants. But due to the fact that transaction confirmation speed sucks, merchant can't do anything but to wait till the problem with confirmation is fixed.