Due to wire time delay, keeping it in a cycle would be difficult to time right with market movements, which is why I've been told this sort of arbitrage doesn't already exist to even out USD/
BTC vs CNY/
BTC.
Though if you have a counterparty billionaire with USD and a good lawyer, you could set up a deal sort of like
mine where enough of their USD is used to buy up all
BTC in a market order just below the level of CNY, then you get their
BTC sold for CNY, do the forex, and send their mass profit split/USD wire return right away and see if the USD-only
BTCers keep dumping their coins to keep the gap wide as the Grand Canyon, or it evens out for a while.