Petroleum was not a major economic resource in 1867 when they made the Alaska purchase, and oil was not discovered there until almost 40 years later in 1896. Just because a commodity isn’t valuable yet or discovered yet doesn’t mean it won’t be later, for purposes not yet imagined.
"there'll be pie in the sky bye and bye bye and bye."
Then you and your fellow space enthusiasts form a corporation to explot these non-existent riches. Be a real conservative and keep your hand out of my and my fellow taxpayers' pockets when funding your boondoggle.
NASA has examined 841 pounds of lunar material. It is all pretty common stuff - basically rocks and dirt that you can pick up right down the street for a lot less money. Scientifically it's valuable if you're looking into the origin of the solar system. From a commercial raw material viewpoint it is worth about the same as 841 pounds of volcanic rock from anywhere on earth.
In fact, if you read Science (rather than science fiction) you will discover that the prevalent theory on the origin of the moon is that it is a large chunk of earth's mantle that was blasted into space by a violent collision early in the solar system's history. This means that what you find there will be pretty much the same as what you'd find as an average composition of the mantle Lots of the lighter elements, carbon silicon iron titaniaum calcium magnesium oxygen sodium, etc. not so much of the heavy ones.