The antonyms for the phrase "remaining standing" are numerous, as it implies a sense of stability and continuity. Some possible antonyms include "falling down," "collapsing," "crumbling," "sinking," "toppling," "slumping," "deteriorating," "failing," "demolishing," "disappearing," "vanishing," or "ceasing to exist." Each of these words suggests a degree of instability, fragility or decline, reflecting the temporary nature of everything in life. While some might see the idea of remaining standing as a sign of strength, others might view it as a signal of resistance to change or difficulty adapting to new situations. Ultimately, it is up to the context to determine whether "remaining standing" is a positive or negative quality.