My wife cancelled a holiday in the Far East. The airline seemed to be overwhelmed by people doing the same thing, so probably the time to short airline stocks.
Shorting stocks to take advantage of a disaster strikes me as one of the most unethical, immoral things one can do. People still do it, but it doesn't make it right.
(apologies for the moralizing -- my sentiments are not directed at OP who was merely musing and shooting the breeze -- but at amoral Wall Street types).