I think the bitcoin will fall because of RANSOMWARE,it is impossible/Difficult to track who did this and in futur Bitcoins will be considered as a motivation mean for such act
Bitcoin is not going to fall for such a small thing, this creates bad publicity of course, but think of it this way, windows machines are prone to get virus unlike mac and Linux machines and yet people keep using windows despite all the disadvantages, bitcoin will be the same, bitcoin will be used for bad stuff but most people will use it for good.
But many people who don't know about the bitcoins with this incident it has created a bad impression about the bitcoin in those people mind. Even many of my friends were also talking that bitcoins shouldn't be allowed in any countries because mostly used in these kinds of bad things. It is quite hard to explain to those people.