I'm not familiar with Potcoins but from what I do know is that most of them we're started from the POV that if the federal government raids a dispenser the money is in crypto and thus inaccessible, the people buying from dispenseries can use crypto because its in their advantage the dispensery can keep operating. I might be wrong on this and there's more behind it. But legalisation, full legalisation of marijuana is not far away and depending on the business model of these potcoins it might mean the end of their potcoins.