The "No intrinsic" value argument has been discussed to death.

I believe the "Carrington event" relates to a solar storm that would knock out most electronic means of communication. How is the current banking system protected from the same event? If anything Bitcoin is more resilient as the blockchain (public ledger) is replicated across 1000s of PCs.

http://en.wikipedia.org/wiki/Solar_storm_of_1859

Thinking about this...Maybe we should go back to using an abacus??