Gold has been in existence for thousands of years now and Bitcoin has only been in existence for just 15 years and still doing very well in it's growth, Bitcoin will take over from gold and i don't see people going into gold investment more than Bitcoin, one important thing that makes Bitcoin investment more unique is that no matter how small your income is you can start accumulating and that is why you have more people in Bitcoin investment more than Gold investment.
Bitcoin is one of the best investment right now in the world and it has helped build economy of some countries, Bitcoin investment has also made some people very rich, gold investment is only for the rich and one can't carry gold about the way Bitcoin is been done.
If Bitcoin stay the number of years gold has stayed Bitcoin would have been more great than what gold now, for me Bitcoin is greater than Gold, going into gold investment and getting good profit may take you years than getting into Bitcoin investment.