Honenstly I plan to do many things in my life and I know there will be one point when I won't have a time for manga, I pretend to be a civil engeneer and as well as a university teacher, so that itself will take a lot of my time so whenever kids come into play I won't have the time to read manga as I will have a family. Also I plan to write a few books.
There are actually so many things I plan to do that I can see manga getting out of my life sooner than I expect. Though if that happens before my fave series end I might come back to read them until the end one day.
I guess it will be similar to when I was small and had imaginary friends lol, one day I said I would cease to play with them, I looked back on the past many times and missed them but I never went back on my word. Once I say I'll quit manga I'll never go back on it.
I think BBB described exactly what is much likely going to happen with me. I mean, in more than 4/5 months that i didn't started a new manga. Recently i read Shingeki, and it seems that now, i want to start read a lot of other mangas. But the fact is that i really can't. Exams that take days for you to be prepared, i didn't said fully prepared :S !, and if i don't want to fail i can't really start getting addicted on it. Nowadays is only Wednesday and those other days where the less popular manga are out ... so basically i don't spend much time with it.
I know that if i start getting addicted, studies and some other stuff will loose the time they are supposed to have. I mean i am the kinda of people that tries to study for example the less time possible, to have the best mark possible, so imagine what would be if i read manga. I am starting to remember last year again. Where i read manga on the night before the exam
For now i will keep following manga. I am 100% sure that if i am alive, i will read Naruto till the end, cuz it isn't really going to take much to end, but i am not really sure if in 10 years i will be reading manga and for example if i will see how One Piece ended. When you get older, and you start to have to be yourself to deal with the problems, there's the possibility you might not even feel in the mood to read ... or even that you don't even remember that the possibility of reading manga exists. Being an honest as i can, i don't think i will be reading manga in 10/15 years.