I'm not at all surprised by his statements, because the man has invested a lot of money (his personal and company) in Bitcoin, so it is logical that he sees fiat as a melting ice cube, and gold as something that will lose its meaning when Bitcoin positions it as digital gold. I don't agree that gold and Bitcoin can't coexist, these are quite different things that may have only one thing in common in being considered a store of value. Everything else is completely different, from the fact that gold is actually in immeasurable quantities, that gold is a physical product, that it is not easy to transport and use for transactions, and that it has its applications in different industries.
Gold has been in the market for thousands of years, and I don't think anything will remove it so easily from its position. It is not at all disputed that the new generations will be looking for something new, and that some see it today in Bitcoin, but gold will keep its standard for a long time.
If someone threatens what you cherish the most, I think that you will always be on a defensive. I do not agree with his statement because that would mean that there will be a monopoly of valuable assets which is not a good thing for the most part, it kid of defeats the purpose of decentralized finances in a way. The only thing that will remove gold in the market is when there is an abundance that you can just pick it up in the streets and that will be an impossible scale because gold has other functionalities other than luxury and investment.