It depends on the person actually. If you are the type of person who is patient and good at predictions to your investments then trading is best for you and if you are a person who is pretty good at gambling might as well go with that.
Its also a factor on how the person is dealing with trading. I'm into trading and also in gambling but I don't want to compare both of them, I'm good for saying these two are very effective to me. When I'm serious about my trades I'm making decent amount and if I want to have some fun, I do gamble.