SHTF is just plain overblown. There is nothing wrong with having a month or more of food, water, batteries, camp gear, some cash, etc for natural disasters. That is just common sense. As was mentioned, true SHTF nonsense just won't happen, and PMs wouldn't be the currency if it did. In the ultra rare scenario where major long lasting disaster struck, you would want to get outta dodge. If you look at any civil war or major hurricane or riot, etc, there is one common denominator: the ones who did best are the ones who left early. PM are a compact and portable store of value with no counter-party risk, but you'd want mainly gold since it is most compact. Silver is 80x heavier than gold, and 90% silver is even heavier than 999 silver.
...Junk silver can be part of you stack if you want. I choose not to, but I would consider if it was available under spot price...
Junk 90% has its strengths and weaknesses.
Primary strengths are low premium, widely available, govt manufactured and worn from circulation (means tough to fake and not really worth it). It is probably the best way to get the most silver weight for your money, at least in USA, and it looks fairly cool, esp JFK 1964s.
Downsides include extra weight (silver is already too heavy once you get enough), needs refining to pure 999 silver for industry use (melting junk is more cost and illegal for industry, since melting is destruction of govt currency), may have lost some of its weight if significantly worn, and will likely get you lower buyback price, esp during silver spikes since refiners fall behind on trying to purify 925 and 900 silver into 999 silver which industry can use. Research buyback prices of junk and 925 silver during past silver price spikes... you won't like what you'll find.
ASE has high liquidity and is best overall IMO. Downside is premium, but its upsides are the reason for said premium. Quality holds its value.
Generic 999 is cheap but less liquid than bullion.
...bunch of Eagles/Maples etc... along with bars, rounds and 90%. Once I retire I want the people who buy my stuff to be pleasantly surprised at what I have and not just think "Here comes the ASE king again"...
No.
...As long as you stay close to spot and do not purchase fakes you really cannot go wrong.
Yes.