I mean, right now when the American exchanges are always trailing Mt. Gox, there is a pretty consistent arbitrage opportunity. But assuming Gox gets its act tog

I mean, right now when the American exchanges are always trailing Mt. Gox, there is a pretty consistent arbitrage opportunity. But assuming Gox gets its act together (a big assumption) arbitrage opportunities could become fewer in the future. Which means you will have plenty of time to fill your reserves back up if a bigger opportunity comes along later.