What we are finding out is that happiness is the ultimate currency. Not only do happy people enjoy life more and have more fun, but they also practice positive lifestyle habits and have stronger immune systems. When faced with illness, happier and more optimistic individuals have been shown to be more proactive in their medical care, more compliant with treatment and medication, have quicker recoveries and show better health outcomes. So, if we want to be healthier and happier, it’s worth figuring out where money comes into play.