Yes, you can buy gold with gold through a process called gold-to-gold trading, where you trade one type of gold for another, such as exchanging old jewelry for gold bars or coins.

You are going to kick yourself for not purchasing bitcoin.

We all wish we had purchased $500 worth when it first came out, but now? I see plenty of people buying into crypto/bitcoin thinking they're going to get rich, and quelle surprise, this doesn't happen.

You can also buy gold futures, a contract that allows you to take physical possession of the underlying gold at a later date, effectively using gold to "buy" gold.