If you found $100 is it   yours to keep? Well I say NO,because it is wrong to keep someone elses money. Just think if you lost that money and it was in a wad that you saved up for a long time. I know if you found that money you would be conviced to keep it wouldn’t you. So just think you found $100, what i would do is turn it in to the police or buy a decent bike,but I would first turn it in to the police.