I really liked the phrase "Gold-Backed Physical Bitcoin" engraved on the coins. It reminds me of the times when everyone kept asking: "What is Bitcoin backed by?"
https://pbs.twimg.com/media/G8Guo2FbgAEy4Wj?format=png&name=900x900It turned out to be a great joke. Perfect for answering someone from 2014 today: "Someone tried fivefold 'backing', but that backing ended up losing value by hundreds of times, even though it was gold."
From a value perspective: Gold prices may have increased 4-5 times over the past 12 years, but Bitcoin prices have increased approximately 200 times

Back then, spending 5 Bitcoins to mint a physical gold coin…was that really a wise investment? Perhaps not. But using over a thousand dollars' worth of gold to represent Bitcoin when it was only a few hundred dollars was certainly insane.
The official archive website contains all the details, on-chain verification tools, and media reports:
https://goldphysicalbitcoin.com