So... let's talk about the cyber security business ecosystem.

CyberSecurityVentures mantains an interesting list of the 500 cyber companies:

If you want to look into the start-up scene, CyberStartUpObservatory is having a great interactive map, with the companies group up by country:

Are you curious to know what's the top security company? I don't know and I wouldn't trust nothing than direct experience, but somebody gave it a go attempting to write down a chart:

What about the salaries?

What else to add..... it's a dynamic ecosystem where companies are often going for shopping, covering different technology areas, last year we have seen especially cloud companies acquisitions, like Dom9 bought by CheckPoint but it's not rare to get into one company and change soon logo. It's not only cyber security but IT in general, see Red Hat...

What's nice of cyber security is the fact that you can move laterally within security reusing skills, for example knowledge of OS internal are valid for pentesting but for blue team too. You will never get bored!