Manga News-Japon is predicting that Koi no Cupid will end in issue eleven, Hachi in twelve, Iron Knight in thirteen, and Beelzebub in fourteen.
Sales declined by about 300,000 copies per volume since Aizen was defeated. From about 800,000 to about 500,000 is a crushing, unacceptable loss. A sales drop of over 35% is a sign of doom. Businesses look at long term projections and mathematical models. They don't just care how much a commodity sells now, but how much it will in the future. Based on declining sales, declining TOC rankings, and losing it's anime, there is little doubt that Bleach's long term future is bleak. Shueisha is a multi-billion dollar company. Weekly Jump is their most profitable enterprise. They are not dependent on the sales of a single declining series. Ending Bleach will not be much of a loss. Maintaining a series with declining sales, popularity, and limited marketing prospects is more costly than allowing it to end. Newer series have already surpassed it in popularity, sales, and merchandising.
It was announced last summer that this will be the last arc.
It means absolutely everything. Bleach's only protection is that it will end soon anyway.
Bleach's sales have declined by 35%, it's TOC rank has crashed, and it's anime has ended. It is clearly a series in decline. Treating sales as an ordered list is incorrect. Business is not that simple. Bleach's profile has dropped considerable in recent years. Newer series like Kuroko, Assassination Classroom, Soma, Haikyuu, and Nisekoi have overtaken it in popularity, some have also passed it in sales. If Bleach were to continue indefinitely there is no doubt it's popularity will continue to drop.
No, he won't. Bleach will not continue indefinitely. It is in it's final arc, and will most likely end in the fall or winter.