I suggest that displacement current is a "real current" even though there is no flow of charge carriers, reasons:-
1. Maxwell's equations indicate that the displacement current is proportional to the rate of change of the electric field, has the dimensions of current, and it generates a magnetic field identical to one that would be produced by a "real" current in a conductor. For example, consider a capacitor constructed from 2 parallel metal plates. When it is charging, the electric field between the plates is increasing in intensity. The changing electric field creates the displacement current which is said to flow between the plates and is perpendicular to them. The magnetic field is perpendicular to the current and the lines of electric flux.
2. Generations of physics teachers have taught that "real current" is the movement of charge carriers such as electrons. But I suggest that future developments may alter this viewpoint. Physicists from Einstein onwards (and possibly earlier) have been searching for the "theory of everything". I feel that, when this theory is devised, it may include a new definition of electric current.
As I understand it, the most promising contender for the "theory of everything" is string theory. So electric current may be a flow of strings. Such a current may be able pass through dielectrics such a vacuum, air, plastic, etc. The movement of charge carriers may be simply because they are being pulled along by the "string current". As an analogy, consider a river of clear, slowly flowing (ie. non turbulent) water. The current is virtually impossible to see unless there is a marker of some kind such as a floating leaf or a colouring of the water by a blob of dye, etc.