In the end of the story, isn't the only person who benefits the guy who did nothing, got a pot coin, and convinced some sucker to give him a free gram of pot for it? Everyone else gains nothing, and the guy at the end of the line last one holding the coin is the loser. wtf?
I think you can substitute "pot coin" or "any coin" for dollar and the same holds true. Just more people are convinced to hold dollars at the end of the line right now than there are "any coin" holders. Coins backed by products can work regardless of the product if everyone agrees on the trade.