There is great introduction to hyperledger course on edx.org platform. In one of the chapters we can find this image - when to use or not to use blockchain technologies decision path.
so as we can see grocery does not need and does not suit to the blockchain.
Great share! I use this decision tree a lot when analyzing coins.
Do you know you can get paid for your steemit blogs in which you review Cobinhood? https://steemit.com/cobinhood/@starkerz/is-cobinhood-undervalued-get-paid-to-review-oracle-d-first-challenge