Seems fashionable, as a term, but...
When used is it generally part of a clinical diagnosis by an appropriately qualified professional?
Or suggested 'dramatically' by a 'close' relative/friend/colleague?
(who benefits from the suggestion?)
Could it be a criticism used to shut someone up?
Or
A definitive descriptive word to describe (un)reasonable fear?
... Well, it could be either.
If you're the one who this may be suggested of, which would you believe applies?
More importantly,
Why would you believe that and how would you be sure?
It would have been fair, at the time, to accuse Ceasar of paranoia (as driving his decision to consult the Oracle) ..... Strangely, however, he had good reason to be fearful, though we can only appreciate that with historical evidence.