This is uncommon, but while building my personal life management app, I thought of building a todo list app on blockchain, where each todo is a block that cannot be deleted. You have to do it.
I don’t know how it helps. I guess it doesn’t. Not at all, really. But then I thought of it and it was one of those “aha, that actually isn’t half bad” moments that was actually very very bad.
But in any case, with everything that is being built in the blockchain world right now, I’m sure this use case easily beats a lot of ventures.