An idea also vociferously espoused by the FR space kadet contingent along with colonizing Mars and colonizing the moon and other unfeasible stuff.
> It is as even more impossible and impractical to get at this water directly as it would be to ship minerals here from the moon, which is another nutty idea one occasional sees featured in journalism of the grocery-store check-out-line level.
There are ways to bring material mined from asteroids — gold, silver, the platinum metals, rare Earths — down, and it will be done, and economically, within a few generations. But mining the Moon for Helium-3 (that’s the only thing I recall seeing on FR, btw) doesn’t make sense because there’s no He3 fusion reactors, and it doesn’t seem very likely that there ever will be.