When hyperinflation starts in the US, nobody will give a fuck about the dollar, and even the Feds will migrate to bitcoin.
As an American, I'm somewhat worried that anyone with physical bitcoins and/or paper wallets may find themselves getting robbed at gunpoint by government agents when the shit really hits the fan.
When you see hyperinflation begin, get your btc into a brainwallet or similarly invisible form of wealth storage. This is the main reason I've used a brain wallet as primary storage all along.