I am wondering what provisions have you all made in case you die before cashing out your bitcoins? I am single, live alone and both my parents are deceased. My siblings dont care about any of this, however I would like my nieces and nephews to get some of my profits but they are still very young right now. I dont trust lawyers to give them my private keys. I am wondering, what can I do?
In case of death although you mentioned that your sibling doest not care about cryptocurrency just inform them. For sure if you mention how much your bitcoins and other coins are worth you will get their attention. You may also go to a bank and leave a hardware wallet and just inform them about it in case you die.
I think this one sounds fairly nice solution to the ops question. They should put the hardware wallet into banks locker which would be most safe place around. Then as per the bank norms he will have to put the name of nominee in case of the death and the stuff. So easily he can out either siblings name or parents name on the nominee list and give it bank. Then rest is assured I guess. Moreover there will be no question of lawyers and stuff as he will have it clearly stated that value access to be given to those particular siblings and thus they will understand the rest once they see what's inside it. Also do write down thenoruvate keys, pass keys and everything needed to access the wallet and put it alongside the hardware wallet in the bank vault. :-)