I agree if the grid remains intact, crypto currency can provide protection should run-away inflation occur, and it may help end the Fed. The way the supply of Bitcoins is designed to be, it will never be a currency that can establish and maintain a stable economy in the long term. People don't control the price of Bitcoin, because they do not control its supply. Its supply was pontificated by its founder to at some point not be able to increase anymore. With current technology, Bitcoins increase in supply at a level that is acceptable. But the existence of Bitcoin encourages faster computers, which may allow it to increase too rapidly for a time, should faster computers come into existence, before no more mining is allowed.
Also the existence of - BLX:GIDS - Bitcoin Liquid Index
This means Bitcoin derivatives already exist and at some point, the supply of Bitcoins will not be able to control its price because its price will be controlled by derivatives!