Is degree / credential hoarding a psychosis?

[Johann]

This would be an interesting thesis or dissertation topic.

Disclaimer: I have 18 units of undergrad psychology, mostly earned in the 80s. So I don't know a blessed thing!

My two cents:

If you're talking 20 or 30 degrees, I'd say yes, it could be a psychosis. If the diagnosis is confirmed, that means you've had a serious break with reality. Get treatment - fast.
If you're talking, say, half-a-dozen degrees, give or take - then it's likely not. It could sometimes be considered a neurosis, which is much less serious.

In that case, go for it. My experience is that people who appear completely non-neurotic are quite rare, and usually less interesting.

J.