Ever since I became intrested in aliens I have always wondered what they want with us. Here I will post my own and popular theories. Popular theory 1: Mabey aliens are here for our resources perhaps they used all materials and have come to earth to take some of ours (hope they dont want our water or food). Popular theory 2: Mabey aliens placed humans on earth and we are some kind of experiment for them to watch (this might explain why abductions happen) . or we are a "failed clone" and multiplied on earth for further examination and research.
Popular Theory: 3 mabey aliens are here to kill us. mabey they are planning, finding out are weaknesses, disarming nukes, or improvising our combat tatics. the reason dont attack now is not to let us have time to prepare ourselves so when they do attack they will attack all areas quickly and without much resistance or further notice.
My Theory: I think aliens are here to observe and to try to help us if we need it. the reason few have talked to aliens is because of the government. I also think they are trying to teach us something (most likely regarding nuclear missiles and the effects of them ufo reports show some ufos were near nukes when spotted). yet mabey the government wants to stay the violent and is trying to silence aliens. hope you enjoyed comment your theorys here if you want.
I believe aliens excist to help us and basicly what you said, I don't want to meet one and never will, but still why would earth have living thing there should be more earths in the universe/galexy.
I believe in Aliens, and Paranormal Studies[but my head's not as big as Dib's, lol] Anyway, I think they're here to monitor us, not as an experiment, but to check in every so often to se our technological progress...