I wonder what the best way to defend against this would be. Maybe…

I wonder what the best way to defend against this would be. Maybe set up a financial "dead man's switch" which issues a million dollars worth of irrevocable bonds when I'm kidnapped/killed that pay out when my attackers are dead?

https://amp.businessinsider.com/kidnapped-crypto-exec-released-after-paying-1-million-bitcoin-ransom-2017-12