Gold Coast Commodities. READ MORE. Biodiesel and Biofuel . With a growing demand for renewable fuel sources, we want to do our part in protecting the environment by recycling the fats and oils we collect. At Gold Coast, we aim to create cost-efficient and environmentally friendly biofuel from our yellow grease and animal fats. Geopolitics, when the U.S. dollar is on a decline, and cheap prices all contribute to demand for commodities. Oil, gold, and base metals are good bets in 2020.