Good overview of this important psychological point in Bitcoin pricing. It comes down to what people feel more comfortable with holding. There is a lot of friction in the purchasing of gold, transport, market premium, taxes, customs duty, and of course insurance. Balanced against that there is much less volatility in historic gold price. I suspect than many holding Bitcoin may choose to cash out in favour of conversion to the traditional shinny stiff.
.

ColdMonkey mines Gridcoin through generating BOINC computations for science.