Short the commodity market before your plans become known. Essentially selling the new metal at the old price. Your profit then depends on the depth of the futu

Short the commodity market before your plans become known. Essentially selling the new metal at the old price. Your profit then depends on the depth of the futures market at various terms in the future. Secondly, don't bring the resource back to Earth. Take it to the Moon, Mars, or orbital manufacturing facilities, to be used in further space exploration/colonization.