In The Metamorphosis, can Gregor's death be considered a sacrifice in any sense?

I would
argue that Gregor's self-inflicted death does indeed represent a sacrifice on his part. Since
turning into a giant bug, Gregor has become something of a burden to his family, and Gregor's
acutely aware of this. Although he's unable to communicate with his family, he can still hear
what they say about him and is painfully aware of just how difficult the situation is for his
loved ones. When his sister, Grete, tells her father in no uncertain terms that they must get
rid of "it" (i.e., Gregor), the rest of the family agrees with her, and so it seems
that Gregor's days are numbered, one way or the other.

Realizing that the
current situation cannot go on for very much longer, Gregor retreats to the confines of his
bedroom, and at three o'clock one morning, just as the first signs of light start streaming
through the window, he sinks his head down and gives up the ghost. Right up until the end,
Gregor's thoughts of his family were characterized by love and tenderness. Gregor always knew
that if he died, his beloved sister, Grete, would bloom into a fine young lady, unburdened as
she would be by the emotional pain of having a giant insect for a brother. And so it proves. For
in the wake of Gregor's passing, Grete blossoms into a pretty girl, indicating that her
brother's noble sacrifice was not in vain.