Regardless of bitcoin's growth, it will have little to do with what's happening with gold.
It's not a strictly zero-sum game. Bitcoin can reach impressive heights without cannibalizing other investment vehicles.
The nature of Gold being a physical product is what made it an investment vehicle for centuries. As far as I know, nothing really "cannibalized" gold. The two timeless investment vehicles are gold and real estate. No matter how attractive any cryptocurrency or any investment vehicle could be, it will never beat the safety of gold and real estate. The vast majority of people invest in gold and real estate not because they want great returns, but because they're SAFE.
Just my two cents...please feel free to explain a bit more if you think I'm missing the point.