I think gold is always going to remain more stable and will always have a real world use as a useable precious metal, but bitcoin is unstable and unpredictable, though I do think it is the best option to see a big profit and return on investment though it's very risky and not guaranteed. I'd prefer to put most of my money in Bitcoin for investment purposes. I just think we'll need a few years to see big gains hopefully.
We all hope the same, waiting for the mining phase to be cut to <0,1btc, when bitcoin potential will be shown, after mining becomes less attached to the price.
Thing with gold is that there will allways be more gold, where bitcoins can only be 21 million. And with advancement of technology, gold mining can be more and more adopted to yield more gold at less expence, which is not the case with bitcoin.
cheers