When I wrote my book, I was very, very careful to include lots of information about how unlikely a lot of the cosmic catastrophe scenarios are. For example, the odds of a black hole getting near enough to the solar system to disrupt the orbits of any planets, even the outer ones, are so small that it almost certainly hasn't happened in the 4.55 billion year lifetime of the Sun!
Still, I imagine some people are prone to being scared, and if that's the case, the terrifying economic situation, plus reading my book, plus the chance of getting abducted by aliens, is just too much for some folks.
I'd pity those poor, poor people. Still, there but for the grace of God... depending on how the election goes I may be right there with them.