Why? And who is going to use it?
Coz I like the idea of such money. Dunno if anyone will implement it.
People will be afraid of having their values in this coin.
You could argue that then they will use it for transactions. But why, if I have my values in say XCoin? Why first transferring it to DemurrageCoin in the first place only to transfer it to somebody?
Maybe, you could provide an idea how to incent people to join and develop DemurrageCoin?