Honestly, I love the idea of different retailers, etc... having their work cryptocurrencies. It would bring in a lot more happy customers, as they would feel they are actually valued because they're being given a tradeable asset instead of just a reward point redeemable for a discount. Different coins would have different uses in different places and even have different value. Like, I could see trading some Walmart coins for Amazon coins so I could get a discount on amazon products. This is the way.