I’m not giving it a second thought personally.
If it happens it will be so bad that I’ll almost certainly die as a result (due to chronic illness) so I should just keep on living as-is and not worry about it.
On average, governments last 250 years — which means we have a 0.4% chance per year. Using that figure, 100 years has a 33% chance of collapse — as our background.
Or roughly 4% per decade.
People wave off that risk because there’s not a lot that can be done: we don’t know how to make perfect governments and we’ve never discovered a good way to, eg, eliminate the ratcheting tax burdens that destabilize society.
I'm not too crazy about this as an anarchist, mind you, I think there are better stable equilibria we could get to. Don't let the perfect be the enemy of the good, I guess.