Sorry. We were talking about what it means for an "actor" to be "decentralised". Now you're saying that a central bank is someone who has a monopoly on issuing their own currency. So apparently I'm a central bank, you're a central bank, the Chinese restaurant around the corner is a central bank... First of all, none of these people or organisations are central banks. And second, we weren't talking about central banks. I say it again: we were talking about what it means for an "actor" to be "decentralised".