bitcoins are not a commodity. you can not grind them down to make chocolate or bread. you cant melt them down to make electrical parts or jewellery. you cant cut them up to make beef steaks, or other meat products and you cant refine it to make car fuel or power generators.
Could you use bitcoin to buy say virtual cacao or wheat in an MMORPG then sell said bread or chocolate after crafting it and earn a profit from providing such a service? We do live in virtual times...