Well this is funny. Believe it or not, my attempts to sell something nobody wanted are actually the very thing that made me think the way I do. I had something

Well this is funny. Believe it or not, my attempts to sell something nobody wanted are actually the very thing that made me think the way I do. I had something I couldn't find a buyer for -- something specific with only as much value as any buyer would care to assign. But my potential customers had something everybody wants including me -- a medium of exchange as you say, that can be easily converted into anything else. Selling is harder than buying because what you're asking for (people's money) is more flexible and reliably worth something to a greater number of people. If you find a market, a bunch of people who want what you've got, more than they want money, you've scored a coup!