Yes, yes the potentials here are limitless! Only downside: Less privacy and freedom.

At the moment it might be a nice discount for those who choose to volunteer. Its easy to see a future where it will be impossible to get affordable insurance if you opt out.

Now exchange car insurance with health insurance. My health habits are probably better than average. I do plenty of sports, no overweight, no smoking, not a heavy drinker etc.. In order to get an appropriate discount I would have to record my whole life.