I think you should research a bit about possible use cases for those metals and how are they mined, how many mines there have been historically and so on. I would guess palladium has some use cases but don't know about others.
I think you should research a bit about possible use cases for those metals and how are they mined, how many mines there have been historically and so on. I would guess palladium has some use cases but don't know about others.
RE: Looking into precious metals