a decade-long extension of the moratorium on regulating commercial human spaceflight
Good! There is no commercial human spaceflight yet, not enough for the FAA to get involved and bog it down even more. IF Virgin Galactic actually takes passengers up, then that's when the FAA should get involved...it's just a waste of tax money for the FAA to do anything before hand. Look at the issues with the FAA and drones; their really doing a "great job!" But ten years is probably too long, this part needs to be reviewed every few years to keep track of when these flights start. Example, if VG proves they will have a passenger flight going up on XYZ date (proves, not just Branson doing marketing), they should HAVE to notify the FAA and do all due diligence possible before the launch. Looking at his recent crash, I'm not too optimistic for any of his previously announced scheduals lol
a nine-year extension of industry-government cost sharing for damages caused by launch accidents
Even with this, no launch company will have the fiscal suicide of not having their own insurance...but the insurance system is very complicated. This all depends on what's being launched, from where, who's doing the actual launching...just keeping the "current method" until there are multiple, monthly launches. SpaceX might not even be launching / landing from within US territory (with his floating pads, which adds another level of complications.
and an act that would give companies property rights to materials they mine from asteroids.
Good for them, if a company takes the risks, puts up their own investor's money and manages to bring back valuable materials it SHOULD belong to them. If you want in on the potential rewards, you should go invest in some "asteroid mining company". There will be ZERO asteroids that are privately mined in the next nine years. Even if one is launched, it won't have any "finished project" to drop on your city in the next decade. With current engine tech it takes months to get to asteroids, if not years. A remote mining operation (and potential refining) will take time, then a very calculated trajectory back to Earth. Now, mining on the Moon...if the current treaties weren't in place we wouldn't even be talking about mining asteroids! A large nation-state might be able to get some type of mining operation done in the next ten years.
If humanity, as a species, wanted to mine the Moon with a combination of remotes and crew, that might be doable within ten years. Even then, I don't see unfinished materials being sent back. In-space fabrication will be able to do far more amazing stuff than we can do on the ground anyway.
The biggest threat to your city would be someone hacking an automated return mission, re-directing it to smash into a city.