this will happen if the USD collapses under the massive weight of global debt
we'll reprice gold, silver, labor, food, shelter; everything will be repriced into some other currency
Gold is being bought up by central banks around the world, indicating that they trust the USD less and less as a global reserve currency and are hoping to reprice their economies in a more reliable store of value
Monero is what I'm betting on personally, since gold requires vaults, storage, transportation, and armies to defend all that. Monero only requires the internet which I guess could also be attacked. So we should all diversify.
Self-sustaining homes and Self-sustaining town could allow you to barter until a new currency is widely recognized