I don't think gold is fake, I think that the gold system can be faked. In other words, most people buy gold through a system that is likely very fake (paper gold).

And apart from that, physical gold, which I do think can be a good investment now, is also not that useful in terms of medium exchange.

It's just a very captured system. When you buy gold you're buying into a system that is just very fake and artificial. And doing that in a world of Bitcoin is like buying a new gas car when the EVs are going to be much better in the long term. It'll still work but it's simply the past.