Just because something has value does not make it a currency. If that coupon ONLY gets you a reduction in price off something then its a discount. Here is anoth

Just because something has value does not make it a currency. If that coupon ONLY gets you a reduction in price off something then its a discount. Here is another tidbit that makes it not a currency: coupons are intended to not be redeemed more than once. If only one person can ever use it then it fails at its intention of goods exchange. It's not currency.