Apparently theft of radar equipment is more of a thing than arson.
My first thought was about the concentrated value and something like an earthquake or a plane crash. My second thought was "how long would it take to replace one of these planes?" but I guess an airline could replace it within hours due to the Boeing delivery backlog, but likely won't need to because of the lack of demand for travel right now.
Not a trillion, but still expensive.
Even 100 737s in one place wouldn't crack $20 gigabucks. And the 787-8, one of the most expensive planes, only costs about two 737s.
There is far more capital in parts of Manhattan or wafer processing warehouses than commercial jets could be valet parked at a civilian international airport.