One thing that strikes me is the person with the most coupons happens to be the person with the least amount of need for the coupons. Therefore they will never

One thing that strikes me is the person with the most coupons happens to be the person with the least amount of need for the coupons. Therefore they will never redeem them and eventually everyone runs out. A true currency (and Bitcoin if its a true currency) allows the most avid babysitter to get other things with it instead of what she already has a surplus of.