then you better have a remote farm with plenty of water and ammo to defend it. Gold and silver might not even be very useful in that scenario.
The real crash will very likely be less dramatic than that. Cell phones are everywhere in Tanzania, even locations that are hours from the closest electricity. All new smartphones have wireless capabilities and they can be set up to talk to one another directly without a need for a hub. The Internet is continueing to move towards a true meshnet which will make controlling or shutting it down much more difficult. If the Egyptians can keep digital communication going when the government does everything it can to shut it down then Ill bet that we will be able to do the same. As long as a huge EMP pulse doesn't fry all of North Americas electronics that is.