No one is going to be honest if I ask, and no one is going to not pick it up, I think the best choice is to keep it, and store it safely somewhere, while you deposit little by little.
A woman got jailed in Britain for
6 months for picking up a bag she found in the bushes outside house. The bag contained a small amount of stolen clothing, looted from recent London riots.
She was a youth worker, no prior convictions, with 3 children of her own.
In Britain, we have more reason not to do opportunistic things like this now