For me crypto currencies are just another currency like US Dollar or the Euro and I would never share publicly how much Euros I carry with me when I am going out, or how much money I have in my bank account. These are private information that I might share with my closest friends and my family, but never publicly. Bitcoin shouldn't be treated any other way. What good does it do if we are open with how much money we have invested in cryptos? To me it doesn't seem that there is any benefit from it and only will make feel people bad or even risk our own health. The kidnapping story is a very rare occurrences and I wouldn't worry so much about it in my country. Here it's more about being polite to strangers, because we don't know in which financial situation they are and it would be wrong to tell them how much money we have. I can happily talk about crypto currencies without mentioning how much I have myself.
Boasting is truly a disease that many people suffer from. I also really don't understand what benefit is there in telling people that we have a lot of money. Meanwhile, if we look more closely, it is clear that bragging brings us more trouble. Besides putting us in danger if someone intends to kidnap us for ransom, bragging will also make others hate us more instead of respecting us. Bitcoin or any other valuable asset, we should hide as much as possible because it will help us sleep better.