People will exchange things they have for things they need, at a mutually agreeable exchange rate.
Right now, we do that with stuff called 'money'. This is (right now) magical paper printed by a private concern that is supposedly backed with the full faith and credit of the United States....whatever that may be worth.
In the past, people used actual hard coins...made from various long-lived and rare metals like gold or silver. The exchange rate then was as it will be: People will figure it out, and there will not be some governmental overseer telling you what the 'official' exchange rate is.
Even before that, people would trade what they had (e.g. corn they grew and harvested) for what someone else had (e.g. leather from cattle they raised, slaughtered and tanned), and that worked pretty well too. It was only when an intermediary became necessary (say, a shoe maker to take the leather and turn it into a pair of boots) that 'money' really started to take off. Since the shoemaker didn't want to become a warehouser of corn and cattle, etc.
We have some precious metals, both on-hand and in equities. I have purchased previously circulated silver coins from AMPEX, Northwest Territorial Mint and Kitco, without problems. I also visit the occasional pawn shop or coin shop in my travels and buy small quantities of silver or gold coins, if the shop owner and I can come to an agreement on the rate of exchange between his product and the fantasy paper I have in my pocket. Over the years, I have managed to purchase this real money at prices averaging far less than current prices, even accounting for inflation.
What good is this? Here is a link http://commanderzero.com/blog/2013/01/19/gun-day/
to an explanation.
And in honor of Gun Appreciation Day even though I am in PDARK right now, I will be purchasing a new firearm...This one
#$#%#$@%$#% you, Obama, Biden, Feinstein, Bloomberg, Reid, et al.
There must be at least 550 lamposts in DC...anyone have some rope?