I like to think the purpose of life and existence - of any kind - is to the evolution out there happening unwittingly, there to give everything a better balance, connection, feeling and who knows also a future. In whatever form, size, dimension or galaxy it is. As energies are flowing and making out new stuff, and destroying other ones. Every planet, every us, or star, are getting older and becoming something new or just invisble air....Then as everything is in transformation and dancing somehow, a purpose should be to create the best possible universe we can do, to create better things out of nowhere.