Here Adam Back said: "With a perpetual generator out back with a satellite dish, a Raspberry Pi by the generator, a local wi-fi hot spot, and the necessary software set up, you could be transacting globally with bitcoin."

Anyone can explain me why is the need for a local wifi hot spot here? And how much does it normally cost to setup a satellite dish?

Not to mention countries do have the ability to jam satellite signals. Here's the first article I find on google search: http://www.spiegel.de/international/world/silencing-unwanted...