what should i have my a$ in if us really tanks

Hi their.
I don't have gold but some gold shares ..........
I'm not much of a poster but very interested in where I should have my (A$) if / when the US $ and world markets take another tumble in the future where might be best to protect wealth ?. Banks,property or currency's ( other than US ).rather heavy in shares and cash at the moment.Any thoughts or idea's greatly appreciated. Regards kennyg.