Don't be so quick to dismiss gold and silver. They both have their place. If you flee to a lesser developed agrarian country (which is more resilient to a failure of fiat money), some precious metal coins can be very handy for acquiring goods and services. The advantage is that metals are widely accepted by street merchants (ironically, except in the G20 countries).

Some precious metals could be a good hold over until fiat has completely destroyed itself and the Bitcoin economy becomes pervasive.