Approaching it rationally, we won't find any purpose to the Universe. But through a lens of irony? The Universe might have a purpose only in one case: the emergence of humans is a byproduct of its micro-processes. In other words, it's completely unaware of us. And if we elevate the degree of irony? It also knows nothing about itself.
Even, death by old age is accompanied by sorrow and deep sadness, though it is inevitable. Ah, If only it could be changed! To live for centuries! Better yet, not to die at all!