Your health is the most important thing you can have. Most citizens of developed societies are nowhere near fit and healthy enough. Already medical bills are the most common reason for bankruptcy in the US, and while you can’t protect yourself against every form of medical eventuality, you can at least improve your fitness.
The coming years will be challenging in ways you cannot imagine. You will be living in a world where hard physical work will be much more prevalent than it is now, and most people are ill-equipped to cope.
Everyone should consider doing something to make themselves as healthy and robust as possible. Tai Chi, Qigong and Zen Yoga are all simple practices that can make a huge difference in your overall health.