People might kill and/or rob you for your money if times are bad and you are not popular.
So it makes sense to be quiet about what you have at times.
This. I don't mind revealing how much fiat I have (paycheck to paycheck; no more than $2k at any point in time,) but when it comes to BTC, and how much I value that BTC, as far as anyone's concerned, I don't have any. At least not on this computer, or any other computer that may or may not exist. Also, it's easy to steal BTC; you can do it anonymously, over the Internet, without any repercussion.
I wish I had bitcoins.....but I got in to late....so I just use them for currency....!