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.
That's not true Bitcoin has no qualification for anyone to hold it, it is private keys based so those who own the private keys have access to Bitcoin, all you have to do is to will your passphrase and your private keys to your children, with all the explanation attached to it and everything is good.
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.
By that time Bitcoin could be worth ten or a hundred times its value now, why would your children disregard Bitcoin at that time, they will even thank you for saving Bitcoin for them.
but I'm not planning to die now, but we don't what tomorrow will result out in the future.
We don't know what's going to happen to us or even the future, but it's better to prepare for every eventuality, and willing Bitcoin to your children is such a great idea.