I think bitcoin is not better than Gold although at the moment the price of bit coin is higher than Gold. Gold is one of the most versatile metals. Maybe someday we can stop using gold for technology. But that day isn't now or even in these few decades. Even this century. I say century because quantum computers are coming and those need gold. Humanity will be using quantum computer for centuries before we can something find better, if at all.
Gold is the oldest metal which is very well known across the world being a resource and a potential currency but here comparison of gold with bitcoin is based on values not based on use and if we compare the value of both so we can easily find out that bitcoin is so much valuable than gold as well as people are also earning more than enough through bitcoin.
When bitcoin survive in the world upto half of the time of gold, so, that time I think people will not ask gold being a valuable resource as compare to bitcoin.