I think this should only apply to crypto hodlings. Generally, it is a very risky thing to flaunt your wealth. Not everyone is happy with you and some will be looking for ways to sell you out to people who could harm you and try to take your wealth.
What is the point showing his entire family his portfolio? Was he trying to convince them to invest, or just for show off. Whatever his reasons are, my take from his experience is that one should be careful who you show sensitive things about you to.
Indeed, we should be careful about whose and whom to tell our holding but much better to just tell no one aside from our husband/wife. In fact, we don't need to involve our life with others, and actually, no reason for them to know that we have XXX of Bitcoin because they really hate it. Sometime, they will tell us a scammer and some say that we are involved in illegal activities.
This is true, only loved ones like parents and spouses are not jealous of us, most people will be jealous of each other when they see others superior to them. That is the selfish nature that exists in each of us. So it would be a lie if we said we weren't jealous of our friends if we weren't equal to them.
Not only with bitcoin but with any asset of great value, we should not share or brag with everyone. That doesn't make people respect or praise us, it only makes them jealous and hate us more.