According to me it all depends on you if you have money to invest then plus points for you.Again if you don't have money to invest then you can take up trading as a part time profession.Another thing to remember is that if you have no knowledge of trading, it is wise to first acquire knowledge of trading and then invest.
How do we trade if we don't have money? Both of them needed money, and I am not sure as to why you said that you don't need money in trading. No matter what you choose, both need money to start, and without it, you can't gain any profit from them. Also, doing both is best if you can do it while you have a job, as this increases your chances of gaining profit.
I agree with you. Actually I missed a bit that I should have said that the money can't be invested at all. Money is definitely needed to invest. While working, we do trading as well.