It is generally bullish, as once people get a little physical gold or silver, they tend to want more.
Costco is the most trusted retail chain, so it is a kind of endorsement of holding precious metals as smart and mainstream.
My suggestion for gold and silver is to get it online from jmbullion or provident metals. You need to spend $1500+ on a transaction to avoid sales tax.
Covid has caused shortages on and off and high premiums, but normally those two dealers have multiple silver options with 3% premium and gold 1% premium.
You can get gold and silver below spot price by using cash back credit cards and using the periodic ebay bucks promos.
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