Except that's irrelevant. Key management doesn't mitigate the threat against you.
If the person who kidnaps you believes you have the necessary keys on you, or remember them or whatever, they aren't going to let you go because you genuinely do not have the ability to provide them.
I fully agree with this sentiment. The burden of proof rests upon the kidnapped person to present the cryptocurrency or say it was “lost in a boating accident” but good luck proving a negative, in which case, you’re probably dead.
If the person who kidnaps you believes you have the necessary keys on you, or remember them or whatever, they aren't going to let you go because you genuinely do not have the ability to provide them.