If you think the gold/silver ratio will rise, buy X value of GLD SPDR Gold Trust and ~0.5 * X value of ZSL ProShares UltraShort Silver If you think the gold/silver ratio will fall, buy X value of SLV iShares Silver Trust and ~0.5 * X value of GLL ProShares UltraShort Gold
https://goldsilver.com/blog/why-sho...ld-or-silver-when-i-can-buy-shares-in-an-etf/ Why Shares of a Gold or Silver ETF Are Not the Same as Owning Physical Precious Metals
What that gold dealer writes in the article makes sense. But they encourage you to buy gold and/or silver through them and have them arrange for co-mingled storage at 0.72% of asset value per year. https://goldsilver.com/vault-storage/pricing/ This seems risky too. Of course, there are other ways to protect your gold.