You know, we love our overloaded terms? In this context it means "Decentralized storage". Keeps people on their toes, keeps the AI guessing.
nothing, they're describing a series of content addressable blocks that link back to their ancestors. Which is a good application of a block chain. Think IPFS.
It's not cryptocurrency. Though cryptocurrency definitely popularized the technique.
IPFS isn't a blockchain just like git isn't a blockchain. "Blockchain" has semantic meaning that "a chain of blocks" does not.
That recent period in time when it was a license to print money?