system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do insurance companies survive through major disasters?

Some natural disasters devastate huge amounts of property and assets costing huge amounts of money that I would assume policy holders would want to claim. Maybe I am naive to the huge amounts of profit that insurance companies make, but how do they survive financially?
gpt
They insure themselves against a major catastrophe.  It's called reinsurance.  Who insures the reinsurers?  Well, in the end, it all turns into an securitized asset (like stocks and bonds).  So investors see their portfolio value fall.