yeah... you're right, as a rule traders consider trading as a source of huge sums of money, nevertheless this shouldn't be the primary goal, at least until you are a novice and don't gain enough skills and experience. motivation has to be complex, I mean not only money should motivate traders to devote the time to this activity.
for example, personal development and acquirement of such qualities as durability, emotional stability and so on also should motivate traders to stay charged. it will be a real lie, if I say that traders aren't interested in money, of course they do and this is the primary goal. However, money likes silence =)