I have to ask.  How much money do you have into investing and creating a retail company?   Sorry, just have a feeling you don't already own a store, or have the funds for what you are describing.

Also, you have the idea of Decentralized wrong.  Decentralized means you don't have control over the coin.  And it's not backed by a retail chain.   It's created, then sent into the world, backed by people mining, and they are the ones to get the coins, not the company.  You may have a pre-mine to distribute, but the larger it is the less of a chance people will buy into it.  What you are talking about sounds lik the exact meaning of a Centralized coin.