Inheritance can be complicated, so consult a professional about that, too. (Or at least give seed words to your inheritors or executors, so they can dominate any arguments.)
This is a good point. When XMR is one day worth $100, $500 or $1000 USD in the years to come. You gonna maybe want to let someone know how to access that juicy XMR wallet(s) just in case you die suddenly (car accident, heart attack etc).
Who to trust the keys to your wallet? I would prefer no one knows until I am actually dead.
Sorry, a bit off-topic I realised.