Have you heard of NFTs? It stands for "non-fungible token" and is being touted as the latest technological phenomenon. Where Bitcoin was hailed as the digital answer to currency, NFTs are now being seen as the digital answer to collectables, like artwork, but plenty of sceptics fear they're a bubble waiting to burst.
So how exactly does this all work, and why are some worth millions? BBC Click reporter Omar Mehtab breaks it down.
And if you want to find out more about Bitcoin then check out this explainer from award-winning reporter and author Jamie Bartlett:
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