I just want to comment a little on the first point because i think they also need to think a little about wills because this is also important and will have a big impact after the main owner dies unless they just want to enjoy it themselves without having to tell anyone including their families.

The Private Key should only be given to one very trustworthy person as a will if we have a large amount of valuable bitcoin or altcoin. But there is no need to tell them about the amount and price of asset in the wallet to prevent unwanted thing. I'm sure long-term bitcoin holder may have thought about this so that if they died their family could use their bitcoin.