I think a lot of these "hacks" were inside jobs where the owners or employees just took the money and ran. How can a cold wallet get "hacked"? Really? I don't believe it for a second.

Anyway, all of these hacks combined pale in comparison to this 1 billion dollar fiat hack:
http://www.usatoday.com/story/tech/2015/02/15/hackers-steal-billion-in-banking-breach/23464913/

At least a lot of these really poorly run businesses will cease to exist. Bitcoin companies that don't take security seriously and adhere to best practices will not last long in this environment.