Copper is a commodity used in electrical wiring, plumbing, and various industrial applications.
A demand shock (AI data centers, electrification, EVs, defense) collides with a supply shock (depleting century-old mines, 7-12 year build times, almost no new tier-one mines); meeting GDP-only growth requires as much copper in 18 years as mined in 10,000, so the price should easily double.