[25b top] Braisa: If one finds a sela (coin) in a market place, and then his friend claims, “It is mine!” Even if he provides an identifying mark or his name is written upon it, he has still said nothing (and is not given the money) because an identification mark does not help with respect to a coin (or dollars). For one can say, “He may have spent it already and someone else lost it.”
Ritva quoting RambaN: Money moves and is meant to used. It is even called “zuzim” because ZUZ (it moves) [as opposed to other objects which are usually kept once obtained].
D-E-ep Thoughts: We Jews are taught not to be money hoarders. Money is meant to be used as a means for accomplishing [ie: tuition for our children, giving Tzedakah, buying Torah books]. There is no greatness in being a billionaire. What we do with what we get makes all the difference.