It would suffer a temporary drop then inevitably climb back up again. Bitcoin is global at this point. No one jurisdiction is going to shut it down.
https://en.m.wikipedia.org/wiki/Long-arm_jurisdiction
https://en.m.wikipedia.org/wiki/Disgorgement
http://scholarship.law.berkeley.edu/cgi/viewcontent.cgi?arti...
http://www.scotusblog.com/2017/04/argument-preview-long-arm-...
Especially as countries like Japan are embracing cryptocurrencies. That must make other countries wonder whether trying to attack cryptocurrencies will end up leaving them at a competitive disadvantage.