Okay, but that asks the same question: What do you want to use the stuff for?
Imagine that I told you that I have a new venture to mine slate in the arctic. And when asked I would tell you that it is very expensive to transport slate from the already existing mines to the arctic, which makes the arctic mined slate that much more valuable. You would immediately see that this is true, as long as there is someone who wants slate in the arctic, and very much not true if there is nobody there who needs pretty roofs or blackboards.
You can't build anything useful or fun with slate in the arctic.
But you can set up low/zero g manufacturing on/near the moon, military installations, incredible observatories, and unique tourist facilities.
You can also set up space habs / moon bases for people to live in in the far future which would spread our bets as a species in a way that living in the arctic doesn't.
Imagine that I told you that I have a new venture to mine slate in the arctic. And when asked I would tell you that it is very expensive to transport slate from the already existing mines to the arctic, which makes the arctic mined slate that much more valuable. You would immediately see that this is true, as long as there is someone who wants slate in the arctic, and very much not true if there is nobody there who needs pretty roofs or blackboards.
Somehow with space this is less obvious?