Look, close family like your mother, father, brother, wife, child should have this information, in my opinion. However, I'd argue not disclosing it to the entire kinfolk. Like, okay, why should your brother-in-law know every little detail about you and cryptocurrencies?
That's what I said as well. Not everyone belongs to the same circle of trust. Your immediate family should be in the inner circle. Most other people fit on some of the outer rings.
I don't think we are talking about the same thing actually, you seem to talk about funds/investments belonging to your couple/family while Wind_FURY and me are talking about your own funds, money that you want to keep for yourself.
Your stuff becomes hers, and hers becomes yours. Anything else, won't work long term. I don't see how a successful marriage could work if you told your wife this is mine and that's yours. Stay on your side of the room.
I am exaggerating with the last part. If someone wants to "target" you as BlackHatCoiner says because you owe him money or because you're wealthy. Don't you think it would be unfair that he tries to target your wife or your children instead of you, because he knows or he thinks you are the kind of guy sharing your crypto seed with his family and it will be easier to use social engineering tricks on them or worse things than that?
I will answer that with a counter question. If someone wants to hurt your family because they think that could earn them money, don't you think they will do it despite what your wife knows? As a threat so that you pay, and a warning what will happen if you don't.
Anyway I'm not sure people are kidnapped and tortured everyday for this purpose, but I'm sure people are scammed everyday, so IMO there are more chances for your spouse to be scammed than being kidnapped thankfully. So what will you do, if someone is able to imitate your voice and ask her by phone to immediately send all your funds to a given address because you've been hacked and you are away, for example?
If kidnapping doesn't occur that often, what are the chances someone who speaks and sounds just like you calls your wife and asks her to send all your crypto somewhere? Or even uses some software that sounds like you?