Investment with bitcoin is good but it have a disadvantages when death occur, bitcoin is not a property which your children can inherits like other properties that is mark able, I notice that with all the I have being investing in bitcoin if mistakenly I return to my maker without by children knowing my bitcoin wallet security password, that means that my bitcoin will remain in my wallet till eternity, this gives me a nightmare, my kids are three and I want to have different wallet of bitcoin and WILL my bitcoin to them with the password of each of the wallet. Because my investment in bitcoin I will make sure that they have know bitcoin because of the wallets I will issue to them, because if they are not willing to learn bitcoin I can't force them to learn and understand bitcoin, but when I'm no more the will know the important of knowing the basic of bitcoin, but I'm not planning to die now, but we don't what tomorrow will result out in the future.
In situation like this then i would usually be having that kind of will which it would be including that some sort of USB or falshdrive containing all of those private keys. Of course its a bit risky in putting up some safeboxes
or would be deposited something like this and on the time comes that you've died then this is the time that they would be able to access those things but of course you should really be letting them know
on whats Bitcoin or crypto is all about so that they would really be having the idea on how to access it and make some conversions if ever they do want to have some money.
If you do trust up your child then you could also let them know about those phrases or have access but actually it is really that hard to entrust out when we are still alive.
We dont know on when those coins would be accessed out without your permission which as long someone does know the keys of such wallet then it could really be accessed anytime.