That's the same thing my grandmother asks me all the time. We live very close to Yellowstone and all the hype over the Yellowstone Caldera has her thinking it'll blow at any second and it's her duty to save us from becoming crispy critters.
But, as others have said, this is my home. I've put down roots and I'm not about to compromise my happiness because some disaster might happen within the next 2 million years......maybe.