I don't know why you guys keep worrying about friends of people you know asking you how many bitcoins you owner: I think it's easier that the same person that owns several bitcoins will tell his friends just to brag about it. I own a little cryptocurrencies, I know other people who do as well, we never asked each other what we own.
Therefore, not all close friends have bitcoin, they only know bitcoin is expensive because they see it from the news while what I am worried about is that they are trying to do something that can threaten me so I want to avoid it.
We also have some friends who are already involved in bitcoin each other have bitcoin but never mention the amount we only discuss bitcoin trends.
About the information on one's Bitcoin, it's better to keep it a secret, who knows the intention of anyone? What we are hearing daily on how people are being hacked and robbed of their Bitcoins should be a lesson for us all and no matter how you are close with someone, it's better that they do not know much about your Bitcoin standing.
This is no joke, especially when we are drunk, that's the best time to extra information from us, and we know Bitcoin, once they get to know we have it, they can make us transfer it to them either willingly or by force. Although I've not heard of any case where they rob the person of their Bitcoin and still kill them, still, this is certainly not impossible. So, if you do not even care about the money they would steal from you, you have to care about your life as some people might go that extra mile to conceal their evil act.
Now that I want to keep it a secret to anyone, someone's intentions may never know even if someone is very quiet once acting they can threaten us, so close the secret of ownership never reveal anything.
I've heard of a case that might be an example:
Someone has gold and he always talks to his friends (can be said to show off / arrogant) because he already has a lot of gold and stored at home, what do you know the person who stole and threatened him was his closest person, because he felt jealous so he was determined to steal the gold when he was alone at home.
That might just be a lesson.