Like what Jean-Paul Sartre said, we are transcendent, thus our desires to acquire more has something to do with us wanting to be something more or else. We are not bound to be stuck in just one position, at least that's what these existentialist believed which applies to a lot of us. However, regarding losing things and recognizing it value when it's really gone out of our hand, that I think symbolizes how we like having everything on our hands, our control. Perhaps the value of so many things are not even their value itself but obviously how our hands our on them... Yes, that's it :)