Gold is only valuable because it has a use case. A store of value is valuable because it has a primary use. Gold is useful as currency, electronics, jewelry, teeth, etc. So it makes a good store of value. Nothing is a store of value if it doesn't have a primary use. Bitcoin Cash is both a store of value and a useful cryptocurrency. Bitcoin core is losing it's store of value. Because it's not a store of value if it doesn't serve a higher purpose too.