Also, consider that the longer the internet is around, the more that various businesses are trying desperately to monetize from it. Even the largest online businesses such as facebook or google, much of what they deal in is still considered "theoretical dollars" and not hard currencies.
As far as Bitcoin, keep in mind that bankers have had no qualms with launching massive wars in the past, so if push comes to shove they will take no issue with deafening any perceived competition as maliciously as possible.
I find that very hard to believe, consider for example:
Fifty-seven percent of the adult population -- or more than an
estimated 151 million people -- have mobile phones across the 17
countries Gallup surveyed in sub-Saharan Africa in 2010.
http://www.gallup.com/poll/149519/mobile-phone-access-varies... The speed and scale of the world's love affair with mobile phones
was revealed yesterday in a UN report that showed more than half the
global population now pay to use one.
The survey, by the International Telecommunications Union (ITU), an
agency of the UN, also found that nearly a quarter of the world's 6.7
billion people use the internet.
http://www.theguardian.com/technology/2009/mar/03/mobile-pho...Of course, there are many people who can't afford one, but I don't think it's the majority anymore, and it's dropping steadily.
And while most only have limited devices (dumbphones), these have already been shown to be enough to enable very important functions, such as Kenya's mobile-based alternative to banking.