I thought i was prepared too until i experiment the domino effect. One problem lead to another who lead to another etc.
2 days ago I went from wonky gears to 2 rear wheel cap nuts broken followed by a chain jumping every 1/4 mile. I experiment that too with my computer from 1 wrong mouseclic to a broken computer at the hardware level. There are lots of examples in the world : sandy's storm, economical downturn, tchernobyl, fukushima etc.
So preparation OK up to a certain point. I take both preventive and corrective measures