I'd like to disagree. The decentralized Wallet is impossible to hide since the entire existence of blockchain-based systems are these numbers, besides. they don't show your real world saving nor do they show who you are - that is up to your posts.
Also, it is to be considered that Bitcoin & Co. don't really have a PIN in the traditional sense, since it's really just a signature for your transaction, nor is it possible to steal Bitcoin & Co. since they are'nt existent anywhere physical. What you mean is transfer the Bitcoins to their accounts. Also, keeping the Key safe is possible - a physical place might actually be your best bet.
Also: Family seems the wrong tag here
Your comment is ok however fraught with errors. The article is based on those who expose themselves to the world without thinking of security -be it in steemit , internet or youtube. I , will prefer to have the option to hide my wallet informations especially when I have whale like power (an option is not a must!). Family tag is very relevant because it is an issue that relates to family, aka security - am long enough here to know
IF you could hide your wallet, then a thief would have the security of stealing from you privately, carrying away the stolen wealth and not being tracked.