Anything you could invest in, which allows you to walk more in a given day is good.
Minimalist shoes, hiking, mobile lifestyle. Living in a downtown city area. The luxury of not owning a car, and being able to walk everywhere, and even walk to buy groceries.
In life, the best optimization to do is optimizing your lifestyle to walk more. The truly privileged person is the individual who can walk the most. Also, maybe it is better to brag about your daily step count, than your bank account or your possessions.