But yes, if the U.S. cracked down on BTC, I could easily see prices plummeting for a while.
I'm pretty sure not just "for a while"

With regards to the future development of bitcoin, Andresen said that creating good forums for discussion was crucial, and joked that he really wanted someone to solve the Internet troll problem. - Bitcoin2014 Conference
I'm pretty sure he was talking about you UglyTroll (and kwukduck, and igorr, and cosmofly, and... and...)
