You never hear about them, you mean.... Look up FerFAL, and Selco, and read their shit.
Knowing when to leave a place is the most important decision you can make, and most everyone gets it wrong.
Ideally, you want to be the person who transferred all his money to another bank in a safe country, and flew out with a flash drive full of all your important documents scanned on it in one pocket, and a bunch of cash and a sack full of Kruggerands in the other pocket, a week before the place burned. That's what separates "bugging out", from being a refugee walking down the side of the road with everything you got left in a couple garbage bags.
A lot of times, sheltering in place is the way to go though, and that means you need to plan ahead, just like the guy who made a successful run for it did.