Why follow oil and gold so closely ????

Why do they always talk about how oil and gold are doing when talking about the markets???
For example, why dont they mention natural gas, or copper as much?? I dont get it?
They are big markets but so are some other ones that are not mentioned right??

Oil has a massive effect on the economy as it's derivatives have an extremely widespread industrial use as well as bein the basis for logistical costs. It also increases fixed personal consumption spends through higher petty prices which means less disposable income which can have a knock on effect in terms of GDP.

Gold is a proxy for perceived market risk/proximity to end of days and the coming of the anti-christ etc

Tothers are less important in general terms. Take the action in rice over the last couple of years... hardly any TV spots.

Makes sense. Cleared things up for me!
Gracias amigo