I'm not saying that gold is replaced by bitcoin, I'm talking about the fact that the crypto currency will gain popularity, as once gold and perhaps someday by popularity will surpass. Gold is palpable, but there is no crypto currency, but it does not mean that it is bad. No ones can say for sure but I believe that Bitcoin cannot surpass gold
It is quite possible that if for more couple of years btc keep prospering and getting the nod from the country's government which make it legal then it can easily take over the gold in terms of the investment and returns.