I'm from Australia, and trade in USD on Gox for obvious reasons.
I was wondering, when the debt situation inevitably hits the fan and the value of USD possibly plummets, what should I do? Will that happen? Should I exchange money now?
What will happen to the USD in the future, and when could it happen?
If you hold BTC in your account instead of USD, you won't be affected by a fall in the value of USD.