The dollar index and the bond market is a better indicator of the health of the US economy than the sovereign debt and banking failures. Sounds absurd but it's the truth. Right now the dollar index is still over a hundred and the ten year bond is 3.4% which isn't at all unusual given the recent interest rate increases. This is a sign the dollar is not in peril.
Remember, there are financial crises going on all over the world. The dollar doesn't exist in a vaccum. International forex traders are comparing the US economy to all other economies across the globe when they are placing their bets, and the US economy is still very innovative and has a strong patent portfolio. Also, the US population is steadily growing while, for instance, many European countries are declining along with Japan and South Korea.
Of course it's a good idea, a great idea, to have at least 5% of your net worth in gold, IMO. For the aggressive investor go up to 10%. Remember, if the dollar loses value everything you own becomes an inflation hedge because it's all valued in dollars, not just precious metals. And, it also makes sense to have some money in bitcoin, though I'd put that closer to 1 or 2 percent of your net.