Buying and Selling on MtGox
If you're looking for the 'quick around' investment, you probably should have money/coins sitting in both accounts. Bitcoins and other cryptocurrencies tranfer nice and quick, but fiat cash is alway SLOW... too slow. Expect the worse case scenario when moving fiat cash. There is no incentive to move your fiat cash quickly. (and thats why we love cryptos :D )