So many people have claimed this before. Highly unlikely. Both have their place in portfolios, to disregard golds history is a big mistake.
People say this since gold is still one of the points of reference when it comes to money, but bitcoin is still very far away to be able to beat gold in market cap, however I will not be surprised if in the next 10 years bitcoin grew enough to have something between 15% to 20% of the market cap of gold.