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".
Totally agree. I always was very private about my crypto holdings. Many people doesnt even know I invest in crypto.
Saying "I have 15 million USD in the bank" is much safer than saying "I have 15 million USD in bitcoin".
Because nobody can rob your 15 milllion from the bank. But from your wallet, it is very easy to rob...