Good money must have seven characteristics (from Richard Russell)
(1) It must be durable, which is why we don't use wheat or corn or rice. Yes, gold is durable.
(2) It must be divisible, which is why we don't use art work. Gold is only divisible using specialized equipment, and in any case requires a scale. This is not practical "divisibility"
(3) It must be convenient, which is why we don't use lead or copper. How is gold more convenient than lead or copper? Gold is not convenient. It is very heavy and not very portable. I believe the word you're looking for here is "portable". Gold is not, not really.
(4) It must be consistent, which is why we don't use real estate. Gold is only consistent if it is minted into coins by a reputable, respected, and trusted authority, who guarantees the purity and the weight of the coin. As raw gold, it is not consistent. The word you are looking for here is "fungible". Gold coins are sometimes fungible. That's why some gold coins ARE money. Gold, as a commodity, is not.
(5) It must possess value in itself, which is why we don't use paper. Gold possesses no actual intrinsic value. It only has the value ascribed to it by the society that uses it. As you claim to have seen yourself, the value of gold has varied widely in recent years. According to you, what is the intrinsic value of an ounce of gold? Regardless, having intrinsic value is NOT a characteristic of money. Money DOES NOT have to have value in itself. And yes, we do use paper for money. Where have you been for the last couple of hundred years?
(6) It must be limited in the quantity that is available, which is why we don't use aluminum or iron. This is correct. Gold is difficult to manufacture, so its quantity is limited.
(7) It should have a long history of acceptance, which is why we don't use molybdenum or rhodium. This is NOT a required feature of money. New currencies have been created many times throughout history, and have been used as money despite a lack of "long history of acceptance".
Only gold fits all seven characteristics.