Theres no need to elaborate all of the crucial moments that had passed by into Bitcoin or Crypto history but one of the major things i do remember in on hacking events just like what happen on Gox, China Ban, Government regulation, more exchange hacks and these things do definitely put out bitcoins price to the bottom but come to think off that if theres negative ones there would be always a positive ones.
This is the reason why we are still here, we do hope and do see Cryptomarkets potential.