Age really doesn't matter when you are talking about death. There is no guarantee we can live tomorrow or the next seconds. You raised a very important discussion, though it has been discussed a couple of times on the forum. As Bitcoin investors, we have to make sure our assets could be accessed by our next generation. For me, I have been maintaining a notebook in real life, writing all the passwords and related credentials of my hardware wallets where I stored my funds. So after my death, my family member can access my funds.
Though my kids aren't suitable yet to teach them about cryptocurrency, someday they could access it. Because my family members know I am involved with Bitcoin, also I informed them I have funds and can be accessed from the notebook in case of my death. Everyone should have an open option for their next generation to access the rest of the funds after they pass away.