About 12 years ago my daughter and I were going for a walk on the street she lived on and found a tiny, worn, leather change purse. It had $385 in it so she took it to the Burbank police station and they told her in 30 days (or was it 60?) if no one claimed it they'd call her. We thought for sure someone would claim it but they didn't. She and I split the $. We still wish the owner had came forward though. What if it was someone's rent or $ they were going to buy food with?
One day my husband found a 10 dollar bill floating on a mud puddle, which was odd that it hadn't sunk and gotten all wet. He also picks up all change he finds and makes quite a bit that way. Unlike Ike, he'll pick up any coin. And besides that his eyes probably aren't good enough to tell if it's heads or tails without picking it up.