Instead of trusting someone outside your family that is your first family before your extended family. It can be your wife your grown up kids. Now, these are the kind of situations why it is good to get married to someone who is morally sound to take security and ownership of all your belongings. If your partner dont understand what value means then forget there is nothing you will tell them when handling the keys to them they wont destroy what you worked for all through your life.
Either way there should be trust worthy person in your family but this is about how trustworthy a person can be because there are a lot of people that when it comes to money, they can even kill there brother for it, and they don't even know the value of how you worked hard just to actually have that in your possession.
I don't think I can trust my wife with my seed phrase because women change and with all this shit am reading online about there wifes cheating on them is just not something anyone will want to go through because you have to give value to your self and don't take any chances because if women can cheat on there husband's and even carry another man's child then it is actually a worrisome situation. Your kids are even preferably entitled to what ever you own so it's not a bad idea, women don't fear anymore they will do what ever will benefit them and this why. You be very careful with how you make some decisions. We just have to keep learning everyday.