I could be wrong, the market consensus does not agree with me. Nearly everyone says that it is a booming field and will be huge. But I've seen that behaviour before and that is what people said about teaching, nursing and nearly every other field that rapidly becomes over saturated and all of the people working in that field see incomes plummet and people entering the field end up without a way to get a job because experienced people already have them all.
The problem here is that security is one of those jobs that sounds cool to teachers, parents and kids. Tell a kid that being a "system admin" is cool and they won't have a clue why. Tell them that they will be on a "security team" and it sounds neat to the layman. Anything that normal people know about in IT.... can only be so high up in the field.