What does thinking about the fact of existentialism - 'reflecting upon reflecting' - tell us ?

Suppose predictions of cosmologists come true and the universe will one day collapse into a primordial atom -  perhaps as a precursor to another 'big bang' -  and every remnant of causality is obliterated.  Alternatively  - since some now believe the universe to be accelerating outwards due to the repulsive character of the 'dark force' - substance may eventually be spread so thin that no life-supporting organization remains possible (echoing the fate foretold by the second law of thermodynamics). What sense could then be made of life, that does not collapse into mewling after intervention - divine or otherwise?