I'm hoping for the best, but still prepared for the worst.
by contrast, i aim to optimise for the 99.999999% of outcomes between the two. :-)
(for what it's worth, significant psychological evidence shows that people overestimate the likelihood of extremely unlikely events, both good and bad. being a victim of terrorism is a good example; people should spend more time worrying about sun exposure than terrorism, statistically, but the latter captures their imagination. similarly, people play the lottery.)