If I found $50 dollars . it depends on how it happens. If I saw the person drop it I'll try to give it back to the person who dropped it. I'll run after it because who knows what will happen.Maybe the person really needs the money for some food or needs to get something . Maybe he will give you some of the money and you might start to feel good.
But if there is no one there then i’ll take it because who knows what you will see on your way to wherever you're going, maybe you will see someone that really needs it . Maybe whoever lost it didn't need it and you did or you could donate it to somewhere but if there was no one to share it with or give it to . Then I'll keep it and buy a feed.