when you buy anything you are in fact exchanging one thing for another, what most people tend to refer to as currency, and i'am, sure what you are alluding to is fiat currency dictated by govt's, however anything that a society uses in general to perform transactions can be deemed as a "currency", as to specific cases , in a number of Asian countries it is not unusual for people to purchase property and businesses with gold ( much to the prevailing govt"s dismay ), as to govt"s a number of them have used gold to perform transactions to bypass u.s. govt sanctions ( whether people agree with the morality/"legality" of that or not is irrelevant ),if that isn't specific enough, which I presume will be the case, I am sure you are capable of doing some quick searches on the internet to find the examples you seek if it's critically important to you, I was merely responding in general to a general point that skol brought up
I find it interesting of the 6 points skol brought up and I responded to that is the only one (?)you have a query about
