I think they'll end up being 2 different types of assets. But eventually the MC of BTC will be larger than gold's because BTC's intrinsic properties makes it a more versatile asset.
Gold will retain appeal with retail investors as a hedge against other investments, with some in the retail sector viewing it as the only investment they would consider. I don't know what is happening or will happen with institutional investors in the spot market. I view the futures market as a consequence of the spot market, therefore I don't consider it a driver of demand. Non- western CBs will continue to hold it as a domestic currency hedge, demand will ebb and flow in that sector depending on how their balance sheets look.
If expectations are fulfilled with regards to BTC, then it is probably going to fulfill the same needs as gold in the retail market with eventually some capacity for them to collateralise their holdings. The spot ETF market will continue to drive demand from retail and institutions which don't want to or can't hold BTC directly. Corporate interest will be driven from a treasury/collateral perspective as companies seek to add shareholder value by holding BTC. Publicly traded companies engaging in such activities will get the attention of investment houses that can't buy spot BTC, as well as other companies offering synthetic investment products based on those companies buying and holding BTC. And if Trump winds back regulatory restrictions around BTC investment then new institutional interest will enter the spot market from sectors that can't buy spot etfs. And of course there's the fact that BTC's supply is finite, whereas gold's is infinite.
And I haven't mentioned the establishment of a strategic BTC reserve which is just a stupid idea. But that doesn't mean it is not going to happen.
So yeh, BTC will eventually flip gold, but I don't think it will affect the price of gold much as most of BTC's activity will occur in markets and products where gold is not a big player.