Due to the rapid increase and progress of bitcoin since 2013 till date,It is likely to say that by 2029 ,bitcoin if keeping up its rate of increase in monetary exchange is likely to surpass gold in its market capitalization,which currently stands at about $17 trillion.
That's assumption because you have no facts about it, bitcoin and gold is not in competition in the Labour markets, what we know is that both of them is a digital currency and when looking at it, you will know that price of bitcoin do get appreciated like yearly and is trying to meet the standard of gold currency, so what I know is that gold has a different goal and bitcoin also has a different goal,but the thing is that people wish to invest on the one they know very well, you know gold has been in existence for long time and most rich people and some countries reserved gold for economy purposes, but its hard before you see a country investing on bitcoin for future purchases and if check round its few countries can invest on Bitcoin why majority is investing on gold, so the gap between bitcoin and gold is still far away