Remember when musician 3LAU sold an NFT album for $11 million on the Gemini-run marketplace NiftyGateway? It might seem like forever ago, but it was at the beginning of March. And now it’s missing. To be sure, you can still find a copy of it on NiftyGateway, but the actual NFT asset is no longer discoverable online. It exists only on a centralized provider, a business that could eventually go bust as so many businesses eventually do.