Conversation so far:
What is blockchain?
A blockchain, originally block chain, is a growing list of records, called blocks, that are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data.
What problem does blockchain solve?
Blockchain technology solves the Byzantine General's Problem using a proof-of-work consensus algorithm
How does blockchain work?
A Blockchain is a type of diary or spreadsheet containing information about transactions. Each transaction generates a hash
What are the types of blockchain networks?
Currently, there are at least four types of blockchain networks — public blockchains, private blockchains, consortium blockchains and hybrid blockchains.
Tell me about blockchain's invention.
Blockchain was invented by a person (or group of people) using the name Satoshi Nakamoto in 2008 to serve as the public transaction ledger of the cryptocurrency bitcoin.

Question: How is it related to cryptocurrencies
Self-contained rewrite: How is blockchain related to cryptocurrencies?