There are two reasons. First, Bitcoin is a non-credit currency ten times stronger than gold. So unless Bitcoin is replaced. Otherwise he must surpass gold. Second, Bitcoin is close to being the ideal non-credit currency, and it is basically impossible to have another non-credit currency beyond Bitcoin. Combine these two points and Bitcoin is bound to surpass gold
Each of them has their strongness in their domain. Gold is strong in the physical dealing while bitcoin is strong in the digital dealing. Remember that you can use gold to buy bitcoin but you can use bitcoin to buy gold. Now the question is, how many bitcoins will you use to buy one gold? Gold is not a currency but bitcoin is currency. Gold is asset and bitcoin is also an asset. And when we come to the value of the two. Gold has value in is area and bitcoin as well. I think the color of bitcoin is gold.