I'm not sure your analogy of GPU mining hardware makes sense to me. You can have Bitcoin without having GPUs. Just like you can have gold without having a mining operation.

So if Bitcoin crashes to some hypothetical value tied to consumability, you're left with nothing. Whereas gold is still something you could sell for industrial and fashion use.

I don't think there's a good analogy between cryptocurrency and gold because they're not very similar at all unless people only narrow the scope to long term holdings and ignore risk/speculation.