You can specify that in your will. And then the lawyer will pass it on to your children..... Or your wife. I don't know. But honestly I've been a bit disillusioned with cryptocurrency lately and I'm much more interested in working with cryptocurrency on an exchange than just collecting on a wallet. A friend once told me:
sell your crypto , then buy more when the price drops, do that a couple times and go to the exchange. Now I earn quite well. And not in the perspective of the fact that bitcoin might grow someday, but here and now. But I don't think that this kind of income will suit everyone, to be honest. So many people have lost money on it