I have reallocated my 401k into a slightly modified GB (with 15% in gold and the leftover 5% in a stable value.)
Hopefully it doesn't all blow up!

I have up until this point been nearly all in equities. (Some was in a balanced fund so I was probably around 85/15.)
I was able to essentially ignore the last big crash, because I felt I still had plenty of years to go. Otherwise it's been fine, due to the seemingly endless rise of stocks.
However, I recently turned 51, and for whatever reason, this triggered an OMG! panic about needing to think about preservation. All my eggs were in one basket.
It's been much easier to leave things alone all this time, even knowing that something was wrong, than to make this big change. Kind of a "psychological momentum."
Along the way, I've discovered that there are a lot of smart people who can make convincing arguments with data about what the "best" path is. But basically they all disagree.
And that took me back to a premise of the PP, which is that "nobody knows what is going to happen, even though sometimes someone makes a lucky guess."