I don't think consciousness is an exclusive human property, I think other living beings just have different levels of consciousness. Also, I think consciousness and sense of existence are different things.
I believe consciousness is one of the most powerful and important things in our world. Unfortunately our population lack self-awareness, critical thought, mental health and a bunch of other things that could make the world a lot better.
It's truly amazing that we as humans can explore the offworld, If you think about it, it looks like life itself is an extremely rare thing, we're like 'guardians of life' in such a huge and enigmatic universe, maybe we should look at it with more respect. But, as dimreepr said, we're destroying this one yet.