You can even purchase gold at Costco and other big retailers — but should you? Find out how to add gold to your portfolio ...

Sure, you need a membership, but did you know there's a way to get $20 to spend when you sign up for a Costco 1-Year Gold ...

The first step is to get a 1-year Costco Gold Star Membership, which also comes with a $20 Digital Costco Shop Card* (sent to the valid email address you provide upon purchase), all for $65!

Though it's better known for bulk deals for budget-savvy members, Costco also sells more expensive items geared toward wealthier buyers.

You can even purchase gold at Costco and other big retailers — but should you? Costco offers members an opportunity to purchase one-ounce gold bars in the store, online or via their app.