Your ceiling becomes visible only after you reach something close to it.

You cannot see a limit from a distance. Standing well below it, everything above looks equally uncertain, and any estimate you make is guesswork. Only when you get close does the actual shape of it become clear, and often the thing that stops you turns out to be quite different from what you predicted.

So do not spend much energy predicting where your ceiling is. Move toward it and find out. The information you want only becomes available near the top, and until then the guesses tend to be wrong in both directions.