I see some familiar people here. Hello!
I think diversity is good for investments and for wealth preservation and for prepping. PMs are just one aspect of each. So, I buy PMs. That is, I save discretionary funds for eventual periodic transfer into equivalently valued PMs. At least that small part of my savings will be free of inflation risk.
As far as government confiscation in the US...it happened in the 1930's when the US was on a gold standard. The federal government not only needed gold to back its currency, but they also needed the currency to move for the economy, and if citizens were hoarding their official gold currency coins, then the economy would be much harder to kickstart. Thus, the confiscation. But now, the government no longer makes its currency out of gold or silver, or even bothers to back its currency with gold or silver. They never confiscated silver, and I think the reasons for confiscation of gold are no longer applicable today. If confiscation happens again, then they will be taking more than gold from you. So, I'm not sure it is something to worry about today.