Volatility can be a major concern with Bitcoin. Look at the exchange rates during the past 24-hours. In BTC-e, it hit $880 after going up to $1,100. Volatility of almost 20% in a single day. With gold, the maximum volatility is in the range of 2-3%.
Just to remember you that the 1100 dollars has been achieved after 8-10 days when the pump at bitcoin started at December, soo it hadnt been into on single day, the loss happened into some hours, but the recovery will take weeks or months till we get back the 4 digit once again. I will always choose bitcoin, since it has huge potencial something i doubt gold has, gold has achieved full potencial as i know on the last years, and now its a manipulated asset.