What is the relationship between blockchain and cryptocurrency?

In short, blockchain is a technology, and cryptocurrency is an application scenario based on blockchain technology.

Blockchain is a distributed ledger technology, which can also refer to all blockchain projects. Cryptocurrency is a new form of monetary payment based on this technology and cluster.

In short, blockchain is a technology, and cryptocurrency is an application scenario based on blockchain technology. For example, modern electronic information technology is a kind of technology, and e-commerce is the application scenario originating from this technology.