"Someone like Owen Coyle is looking at Celtic," he said.
"Okay, you've got your Champions League interest, which this year for Celtic ended very quickly.
"I don't know how much of a draw that is these days."
McGhee, who had a brief spell managing in the English top flight at Leicester, added: "There's no argument, the Premier League in England is one of the best couple of championships.
"That's where, as a manager, you should want to be.
"Somebody has to be very careful about leaving that because getting back into it is not that easy. Once you're in it, you should try to stay there.