Gold is supported by governments and rich individuals who like power and control.
Bitcoin at the moment in the big scheme of things is a small market cap minor distraction to these people. Should it start to grow to a point where the people above feel threatened or start to loose some power or control they will simply ban Bitcoin.
Some may say you cant ban bitcoin etc. but if the government do decide to ban it a large % of population will cease to use it preventing it becoming mainstream causing the price to crash.
Russia and China are buying gold as quick as they get their hands on it for a reason, the same cant be said for BTC
They cannot ban it anymore, i mean it has passed the "ban singularity" at this point the only thing they can do is to tax it or regulate it. Or atleast try doing those.
They cant ban it because more then 80.000 merchants use it, and we got a strong lobby community + politicians already ask "campaign donations" in bitcoin, so my impression is that they like Bitcoin, because anonymity is good for them too.
Anonymity? That's why there's cash. Bitcoin transactions are fully traceable.