I do think that bitcoin can surpass gold in the future. Imagine its volatility making its market price and cap to rise in just a couple of hours. How much more when it continuously rise each year?
People interest in crypto currencies is increasing from time to time, in fact bitcoin is giving them a quick profit as compare to gold where we can see a very slight increase even after month some time even after years, therefore most of the people are now giving preference to gold as copper to gold.