telling a wife or trusted person some secrets always comes at a risk. by giving them that information they can become a target if someone else thinks or knows they know that information. it's not about whether you trust them but what type of situation it might possibly put them into. yes they can pretend they don't know anything but if your story doesn't match theirs then someone is lying. robbers aren't dumb. but in the end you do what you think is most reasonable.
Trust in your wife is very specific depending on how you judge her behavior, our location has low divorce cases and our spouses will keep secrets for any interest but the main thing is don't publish any investment to others so they won't suspect having assets bitcoin on hw or exchange, so our family will never be the target of robbery or any kind of crime because they will not dig any information from our investment portfolio. Never show off bitcoin investments to anyone and any social media, let your assets be anonymous and there is no benefit if other people know about it and only cause trouble for your family.