I once heard that the one thing we might mine on the moon is He3, once/if we get to that level of fusion power. There's apparently a lot of it, and it's right a

I once heard that the one thing we might mine on the moon is He3, once/if we get to that level of fusion power. There's apparently a lot of it, and it's right at the surface. But the advantage of asteroids is that everything is at the surface.