Why You Should Know Someone From Your Family Manage Your Accounts Send and receive money ?

Trading platforms and e-wallets are highly protected and nobody can manipulate your account, especially as it contains a private key. There is another way to go with email and 2fa. Most people know that their phones are protected by verrouillage schéma and you are the only one you know. These protection methods include many of your accounts. I think no one knows her otherwise
Why do you have to register all your emails and passwords with your money and tell your family (your brother, your sister, your mother or your father etc ..)? A disaster comes on the owner of the house and dies or loses memory or something like that. Dear Brothers, trust your family with your wealth and knowledge. When death comes to you, this does not tell you who in your house knows how to manage your accounts in detail and everything recorded in Flash Disk
Thank you