We would destroy ourselves before we have the technology to get out? I don't think so, technology is improving exponentially. Do you even know what that means?
It means we invent new things faster and faster. What we discover this year will pale in comparison to what we discover the year after that.
No, I don't think we'll destroy ourselves that easily. The world hasn't been this stable in... forever. Europe for example has never been this peaceful in a long time. In that sense, I can kind of agree with the nobel prize to the EU for peace and stability.
And finally, the very fact that you can be this pessimistic about our future is only a good thing from the right perspective. It means that you care for the human race and not just your nationality. Globalization has that kind of effect. It's only a good thing because it means you care about humanity's future. Thoughts like these weren't very common before.
No, I think everything will be just fine. Improvements are going the right way. As long as we don't start a WWIII we're all good. And even if that happens, I think we would survive and rebuild, and we'd have even more of a reason to try to live together.