There is an ever-growing list here in Jameson Lopp's website:
https://github.com/jlopp/physical-bitcoin-attacks, reporting cases of physical attacks for crypto.
It's a huge problem and we should never discuss our holding with anyone, just like nobody would ever go out shouting "I have 15 Million USD in the bank".
If you check all those cases a very good investigation will always review that the crypto holder himself is responsible for his privacy and letting out information that is used to carry out the crime against them, it is very important to know the basic features of Bitcoin which are privacy and we need to practice that privacy, you can never hear me discussing anything related to cryptocurrency in my environment reason is that there is already a stereotype belief about cryptocurrency that anyone holding it must be a wealthy person most especially bitcoin.
The rising cases of crimes and random demands I'm crypto have exposed the level of knowledge that the bad guys have about cryptocurrency and privacy right now so the best we can do is not to let out any traces. No one should identify you as a cryptocurrency trader and what the heck. Low key and high privacy.