The blockchain provides an immutable store of data. Access to that data may or may not be assured, but the data will be there regardless of whether it's accesse

The blockchain provides an immutable store of data. Access to that data may or may not be assured, but the data will be there regardless of whether it's accessed or not. An immutable data store of data would be a new type of storage system the world has never seen before. Up until now, things stored in a database have always had a decent amount of probability they wouldn't stay there forever. It would be nice to be able to pay a decent amount of stored value to keep some truths as universal truths, where the probability of losing those truths approaches zero. I think there are truths that are worth keeping around and ones that are not. Figuring that bit out is the next hard thing.