Let me rephrase it for you to understand.
The let´s go collect "x" to get "y" is what i meant, not what are you going to use it for.
Also i haven´t read the manga, so how would i know if they´re going to keep up the main plot line? I (not my case, but a point of view) am a casual anime fan, i see this anime that everyone talks about and that seems pretty cool. I watch it, they tell me this guys are supposed to collect "x" to get "y" if i have watched InuYasha, Dragon Ball, Yu Yu Hakusho i´m going to get dissapointed since it´s an old recycled plot, and probably drop it before it gets to something new.
I hope you get my point now