Life is the most important thing in life. Things which are important to life are valuable to life. Value is an attribute attached to objects, be it physical or not, that have use in the growth, well being and happiness of life. Money is liquid value.
There is a certain condition when value is sought for the sake of value itself and not for the sake of need or what that value can be translated to. In other words, the greedy person has attached the attribute of value to value itself. A kind of second value or recursive value. This is simply a perversion of the mind.