The use case for PotCoin and Paragon are totally different. Paragon intends to open brick-and-mortar locations in all 20 states where marijuana is legal. The Paragon blockchain will be used to streamline the doctor-to-patient verification and prescription process. And Paragon (PRG) coins can be used to purchase items and services at those locations. However; marijuana can only be purchased with cash as per compliance with state laws. Once the legal hurdles have been overcome, I suspect they intend to allow PRG coins for purchases.