Memo is perfect for quote authors (block chain proves FIRST source of a quote - NO FALSE claims by third party’s). Its great if you want data permanent & guaranteed for imagination and innovation...
Or world-changing ideas/inventions. Then you can say, I was the first to think of that.
Oh wow, how cool. You could also write a document, then post the hash of that to the blockchain. Then later you could prove you had the document at an early date without revealing yet.
