Thanks everyone. Looks like a lot of varying points of view.
I stack as a hedge with only around 15% max of my portfolio in PMs. Also I just really like Silver a lot (I can't explain this one).
When I started stacking I was really into the thoughts around complete world economic meltdown just around the corner. In the time since (about 4 years) I have calmed down and think that although PMs have a definite role as money and should be part of every portfolio, I should really have all asset classes as part of a balanced investment portfolio. Sure bad economic events are very possible and market crashes are a definite on a regular timeline, but going all in on PMs is not something that I can see as investing.