If you are planning to pass down your assets to your next of kind, then they need to have knowledge on cryptocurrency and the blockchain to be able to properly manage it. They have to start now to be best prepared for any untoward circumstance.
With such knowledge you can grant them access to your private keys and wallet addresses or keep it in cold storage for when they would need it
I agree with you that it is true if we want to give a crypto with relatives or who he must be who really understands crypto so that in the future there is no disappointment, but better in a family.