Yeah, sure it's that simple. Hey, isn't this all about decentralising power, everyone being their own bank? So let's be really decentralised: Everyone should of course be their own central bank ("Fed"), and issue their own "coin".

So when I want to buy something from or sell something to you, I'm gonna say that a MyCoin is worth ten YouCoin; you'll presumably try to claim the opposite.

How "simple" is that?