Human: I've been hearing a lot of buzz about cryptocurrencies. What are they and how do they work? Assistant: 
Cryptocurrencies are digital currencies that use cryptography for security and to verify the transfer of funds. They typically have their own blockchain, which is a distributed ledger that records all transactions. Transactions are verified by miners who compete to solve complex mathematical problems in order to add new blocks to the blockchain. The more computing power you can provide, the faster your transaction will be confirmed.