Well, your liquidity assumption is quite accurate in comparison to other currencies such as USD/EUR/GBP. For example on the mtgox exchange there seems to be on

Well, your liquidity assumption is quite accurate in comparison to other currencies such as USD/EUR/GBP. For example on the mtgox exchange there seems to be only about 30 million US worth of volume per day which is quite low. US/EUR seems to commonly be around 100 billion or so a day.