Are we really safe with all these crypto hacks?

[Bitcoin Maxi]

What we are seeing is looking like a joke but it might become very seriously if more exchange are getting hacked without any intervention coming from the government. I have been thinking what can be the tools these hackers are using to steal these funds that are kept in a cold wallet with lot of privacy checks before any fund can be moved.
This is gradually becoming a trend and if we see another consecutive hacks, this is when the question will be taken seriously.