If they had a coin for each son who was the product of a failed experiment by Lex Luthor for wanting to make another clone of Superman with his blood that would not rebel against him, they would only have one coin, which is not much but it is rare to happen.

You were the product of a mixture of Dick and Wally's blood during a mission to stop Lex, however when Nightwing and Flash thought they had managed to stop everything, Lex, thinking that the blood samples he mixed were his and Superman's,