70-80% of all financial transactions still take place in US Dollar currency. It may weaken further, and I think we will see 1.60 before we see 1.20 against the Euro, but this is no reason to go pulling your cash out of the savings account and stuffing it under your mattress.
Personally, I've kept essentially the same investment allocation I've had over the past 3 or 4 years - 40% domestic, 30% EAFE, 30% Emerging Markets (20% asia ex japan, 10% latin america). The reason we aren't in a recession right now is fully based on the strength of the global markets. Russia boomed, China is booming, and I think latam is next (mainly, Brazil).
But that's just me. I'm under 30, and have 30 more years until I'm going to be living off this money. I can afford to take some risks and go for larger returns. Also, I work for a large bank and therefore have many restricitons on single stock names and daytrading that I can't take part in.
I'm not anti-gold, and I'm sure it has a lot of room to run. I just think stacking the bullion in the corner of your bedroom is kinda crazy.