When we've gotten ourselves established in space throughout the Earth-Moon system the next place I'd like to see us target for exploitation are the Near Earth Objects (NEO's), asteroids that orbit the sun at about the same distance that the Earth does.
Because they're close, and because of their small size and low gravity, these objects hold the promise of resources within relatively easy reach, resources that even if not richer than those of the Moon, will in many respects be different to those offered by the Moon, and different and richer can mean the same thing.
Lets imaging our prospectors arriving at what they hope will be a gold mine of rich rare earth elements, water and other volatiles, heavy metals and whatever else that has a market value. Question: how to use the asteroid to shelter yourselves from the radiation of space, How to find out what's inside, and how to get out any resources that are there?
Here's an idea that I haven't come across than might solve all three problems at once - blow it up! No, not with explosives.
Small asteroids are not held together too well gravitationally, if they're loose rubble piles even kilometers inside them, even at their core, the pressure from the weight of material will be very small, so in principle it would be possible to drill a single hole, shove a balloon down it, blow air in, and spread the entire mass of the asteroid out over the balloons inflated surface. Then you move inside, hell, move the whole family inside!
OK, you still want solar reflectors to warm the interior, and you'll probably want more than just the balloon used to inflate the asteroid for accommodation.
If we take an asteroid that's a Kilometer in diameter, and inflate a balloon that's a kilometer in diameter inside it, if the material of the asteroid were spread out evenly, it would form a layer about 125 meters thick.