Although the house is speculative, the house itself is very different because the real estate is attached to a specific location. Without standardized things, delivery is impossible!
Although the house is speculative, as a real estate attached to a specific location, the house itself is very different and not standardized. How to deliver?
Moreover, the delivery volume of bulk commodities actually accounts for only a small part of the real trade volume. When there is no perfect delivery system, futures will be decoupled from the spot and speculate on their own, just like a ship without an anchor, which can never dock.