Although it's correct, some people don't care about that because they use it to build their personal branding and make more money with that. So it's really depend on someone personality and goal.
Because Bitcoin is basically anonymous, it's best to keep Bitcoin as our secret to avoid something we don't want in the future. Sometimes to convince or make people interested in investing in bitcoin we don't have to show the number of bitcoins we have, we just need to look at the history of bitcoin from past to present and the benefits of investing in bitcoin for the future.
Most people think someone who have Bitcoin is rich, if you know about Bitcoin, able to explain it to other people, believe me, everyone will see you like a millionaire. You only have two choices: stay silent or people will envy with you.
At present the situation has become that bitcoin is considered illegal in our country if we accept that we have science in case bitcoin is not legal in our country. So I think it's better if we don't share how much of our balance we have or how much bitcoin we have in case we get caught by law.
You don't have to share how much you have, if you said you have Bitcoin, it's over.