I am pretty sure that you can get killed over owning millions of dollars worth anything, especially in a countries that have most violent areas by homicide rate. Like Mexico.
I have said in the past that you shouldn't tell anyone that you are into bitcoin or cryptos, because you never know how much they are worth in the future.
But i honestly doubt that you are in immediate danger since criminals who want bitcoin want to focus their attention towards people who actually own millions of it.
Just being rich youre a target for people who wants to steal from you, lets assume someone is rich, there are criminals who wants to steal from you no matter the part of the world you come from, which is why most people who are rich have security, so if you own millions of dollars and youre wealthy you need to provide adequate security for yourself else youre gone.
However in the aspect of bitcoin you need to keep it private because you dont have to trust anyone, privacy is something we should be taking seriously as were investing in bitcoin, you have to be careful who you tell that you have bitcoins in your possession, and where you also discuss about bitcoin with your friends.
There was a day I went to the bank to do some transactions, I was sitting with some young guys, who was discussing about bitcoin with his friends, he was bragging with his friends telling them how much bitcoin is in his possession, I was quite surprised, which I think it was totally wrong, and he showed them his wallets for evidence, that was a very wrong move because they dont know if there is a criminal sitting there who can attack them to rob them of their bitcoin, because you dont know peoples true mindset sometimes, we just have to be careful out there with how we flaunt wealth and our assets.