I personally would NOT buy BTC with Gold, solely because I can hold my gold, I can carry it and see it. If I wanted to, I could even taste it or smell it. I WOULD sell my BTC for Gold, and in fact I plan to do so at some point in the near future. I've heard there are websites that will sell gold for BTC, so I am going to check them out.
RE: Gold or Bitcoin: Whether it is worth changing one for another?