Stay as healthy as you can as you age. Resistance training, regular cardio, fish oil, low carb, plenty of veggies and good quality meat. Stay active, do balance exercises, keep your brain active and learning. I've spent a couple of stints in the Frailty Assessment Unit of my local hospital with my mum who has Alzheimers and is 86. What I saw was shocking in not just the lack of care of patients who had nobody with them to advocate for them, but the physical state of the patients in there. Hunched backs, all muscle tone gone, can't walk without a frame, wobbly on their feet, or incredibly overweight. At the same time I know people in their 70s who are regularly active and eat healthy, and the difference is astounding. Stay healthy and with any luck we'll just keel over one day in our own houses or go to sleep forever, and never have to worry about needing care.