Collectors are going wild for a special set of 50p coins.

Released to mark the London 2012 Olympics, around 29 pieces were minted to celebrate the event in the UK’s capital. And now since coins are hot topic, after a penny sold for £127,000 at auction, it’s important to check your wallets.

The designs were selected from a whopping number of entries in a public competition back in 2009. Now, a TikTok sensation, @CoinCollectingWizard, with a following of nearly 200,000, is drawing attention to…