This is NOT a troll thread, I'm genuinely interested.
Some bodybuilders and powerlifters have said that they've lost noticeable height through the spinal compression experienced through years of doing heavy squats and deadlifts. Sure, it's natural for you to lose height during the day (whether squatting or not) as your spinal discs compress, and you regain it back during the night when sleeping, but I'm wondering if really heavy squats and deadlifts can, over time, cause the spinal discs to plastically deform to an extent that can't be corrected by simply 'sleeping it off'...?
If you've done heavy squats and deadlifts - it would be interesting to see if you've shrunk any? When you're measuring, try and correct for morning/evening fluctuations in height - you're taller in the morning than you are in the evening which could give false positives if not taken into account, so if you knew your morning height before you even started training, measure yourself in the morning again... It would also help to state your age, so we can rule out shrinking simply due to aging...