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
Well in fact if the malware is REALLY EFFICIENT the price should rise.
Because lots of money will have to be transformed into btc to pay the ransom xD
This would be a good logic but thinking off if the money needed by hackers are ransomed for local fiat money instead of bitcoin then what would be the effect? Its negative on either both sides even on btc payment it may somehow rise up the price but the credibility will surely be affected into bitcoin which would give bad impressions.