Definition always come up with another meaning to what some persons believe something to be, just like how you see trading as a non kind of investment thing while the definition you just render says that since profit comes at the end is considered as an investment and in trading profits and loss do normally come to some persons who have spent all their time on it, so if the definition had mentioned that anything that can give profits and also take it back is not an investment then trading would have been off from it, actually I'm only trying to make a comprehensive knowledge about your definition in non or in relation with trading.
Yes true, if someone wants to call it a gambling then they will have every right to call it and we can't prevent them, and if someone wants to call it not gambling (I do) then you can't prevent us calling it not gambling as well. It all depends on how you trade as well because while some form of trading could be like a gambling, other forms could be not like gambling at all, these are all important stuff that matters a lot.
I believe that we could end up with something that would give us a great deal of situation that doesn't really help with us on the long run. I believe that we can't get better without any type of trouble, we should be considering how it would not be an easy way out at the moment at all.