But see what Chinese government did, simple FUD about potential bitcoin ban a bit of AML policies introduced, and we had price crash from $1100 to $800
It could happen again - only this time in the US.
Not quite , it will bring the price down about 25% to restore again , when people realize they are fooled by the Main stream media , then buy back , and wait for the next wave...
since BTC is limited to 21.000.000 the price will get up , soon because you can only dump bitcoins if you have them , you can not print extra bitcoins , like they do with fiat or paper gold....
Indeed, there would only be a temporary drop in prices and even if the US would create such laws and regulation against bitcoins, that would just slow down the appreciation of bitcoins. If the whole world would ban it, probably that would be the death of it, but if it's just a regulation it won't even dent bitcoins.