That's essentially a "Switzerland bank" from the movies that keeps a box on your behalf and doesn't ask silly questions. So I wonder if there's an unfilled nich

That's essentially a "Switzerland bank" from the movies that keeps a box on your behalf and doesn't ask silly questions. So I wonder if there's an unfilled niche of such "data storage bank" where you give them a blob of data, they store it for you and you trust them not to look inside. This could be also a useful application of those NFTs: an NFT contains a key and by nature of NFTs, the key has one owner at a time and the key is also transferrable.