system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What is a block chain?


assistant
A block chain is in the most basic terms a ledger that is used for recording transactions in a network.  Some of the most popular block chains are etheryum, and bitcoin.  The idea when you purchase cryptocurrency is you make a new transaction in the blockchain and your transaction gets a copy of every single transaction prior to yours from the general ledger.  Everything is trackable this way and every token can be accounted for.  Nothing will ever get lost.