Blockchain can be your own enemy & that's for sure, you can die at any moment without leaving your etail for your family to withdraw those cryptos (in paper or external HD or...), that's kinda of a nightmare too.
I remember this news i rea coupe day ago about that canadian exchange owner who died & was the only responsible of the cold wallet, he died & all the info die with him (the private keys &....)

This is something to consider as blockchain can be your own enemy, other than that, blockchain is more than great.