Other possibility. What happens with bitcoin when there is no internet, when 3G lines are switched off and there are not even mobile lines for failing infrastructures or in zones with inhibitors? What would happen with Bitcoin?
Just some thoughts
You'll have to purchase one of these...
Yes, then i recommend to new users they start to download the blockchain now.
I think bitcoin would be far more secure if there were some kind of open wifi or similar project around the world to provide internet no matter what happens. Who knows, one of those computers for 10 bucks for underdeveloped countries that appear sometimes in the news. Maybe would be nice to have one of those in case of war.