Can we also show our bitcoin key to someone closer, maybe love, spouse, next of kin?
Better still between someone; who introduced and taught you about bitcoin, a friend or family member and your children who's most preferred and reliable person to give out our information about your bitcoin?
The biggest mistake not to fall into is to share bitcoin seed phrase with friends, no matter how tight the friendship is. Not even trust should be a reason to share seed phrase with friends, you can't predict people. People can change or your friend can be careless with the seed phrase and it gets to the notice of a total strangers. If at all seed phrase needs to be shared it must be not more than one family member that's is trusted and not careless. Sharing bitcoin seed phrase is not just about someone who has trust but one who is very careful. Considering only trust and the person is careless their are high possibility that it can be exposed to strangers.