I am sure almost everyone is sick of reading about legal issues.
But I still have one more important thing to say.

If marijuana is ever 100% legal, then there will be very little need for potcoin.
The main reason for marijuana vendors to use bitcoins or potcoins or another digital currency is because vendors have difficulty opening and maintaining a credit/debit card merchant account and because of issues handling large sums of cash.  I am sure someone can post stories about a few banks which openly process payments for marijuana, but that's the exception and not the rule.  If you have no experience maintaining a high-risk merchant account, then please don't even comment.  Keeping an account open is not easy.  There are plenty of legal industries which are considered high risk and thus are shunned by visa/mastercard and various banks.  Any bank which accepts high risk merchants is probably a bank which has issues/problems.  Banks which are very successful don't want/need to work with legally risky merchants.  The bad banks are often desperate (or poorly managed or have other serious problems) and therefore choose to work with risky merchants or otherwise they may go bankrupt.  I know because I sell high risk items on-line and only the worst payment processors and worst banks will accept me.

As long as the marijuana industry continues to have legal issues which make it difficult for marijuana vendors to process payments, there will be opportunities for alternative payment systems such as potcoin.  If you want potcoin to become popular and valuable, then don't hope/pray for 100% legal marijuana.  100% legal marijuana = no need for potcoin