system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why is gold so valuable ?

But really, why does gold have so much value? Why not copper or silver?
gpt
Because it's rare, it's portable, it's easily identifiable, and rich people like to dangle it from their bodies and fashion their belongings out of it, all of which makes it a perfect candidate for a kind of unbacked universal currency.