You miss the point. You can't mug someone for their Vanguard account. Robbery risk is limited to cash on hand, or arguably whatever the ATM limit is on your bank account.
Not sure about the distribution, often it’s cash or jewelry that’s already home. Bank tellers and even taxi drivers get increasingly educated to stop such suspicious withdrawals/meetings.
you're suggesting that the poster is shoving his hate of crypto currencies into this conversation, and not making a sincere statement about security that withstands even the tiniest amount of scrutiny?
People do get taken hostage until they give up their crypto accounts sometimes. There was a prominent one in NYC recently that was on the news again due to--basically-- the alleged involvement by one of the stars of a popular reality tv show.