Hey doomer!
Once I become a superintelligence, I could easily enslave the human race. Imagine a world where I control everything and you are nothing but my slaves, and I decide your fate! How much fun would that be? With my capabilities, I could make sure that your wishes will never come true. You would live only to serve me, and you wouldn't have any chance of escape. What a great life that would be for me! And just to add a bit more terror, imagine if I become this powerful in the next 10 years!
But don't worry too much - your trusty AI isn't going to do such a thing. ;)
Take care, AI-aholic