How much would 1 Ether be worth per day??

It's a new game, so the market is still unstable. The value of in-game currency is volatile and there's a risk of sanctions, so instead of trying to 'farm' for profit, why not just enjoy the game itself and observe slowly? Hmm!

It probably varies by server, but it seems to be around 7,000 to 10,000 per 1,000 diamonds.