One has to be inclined to do things bigger than himself. If there is no passion that drives us, we cannot go very far. So personally, I am interested, so reading, collecting some information, applying this, experiencing different things, learning from this experience, seeing all of this taking a shape is not boring to me.
And if we are talking strictly about money, then there is the possibility of not making enough money, or even losing money, compared to the effort that we are putting. So we should ask ourselves, if the return worth the effort? If we have a regular job, earning good in that job, and doing trading aside, then I guess it is alright. If one wants to make trading a profession, then I think he has to have a system, along with a lot of other things like humbleness, minimalism, patience, discipline, calmness, truth etc etc.
Also, I like things gotten by effort and not given freely, so I love doing some work and getting rewarded by it. Not that rewards are guaranteed in capital markets, but still.
To give an analogy, do you want to play cricket on Sundays or do you want to play at state level, do you want to play guitar impressing a girl, or do you want to play in a concert in a foreign country.
I am thinking of playing guitar both for impressing a woman, and in a famous concert hall 
So all of what I have mentioned above apply for me first, and in bits and pieces, may be to you 