Bitcoin Cash was launched in August 2017 from a Bitcoin's fork, and has since become one of the product of the most after Bitcoin.
Bitcoin Cash differs from Bitcoin Classic in that it increases the block size from 1 MB to 8 MB. It also removes Segregated Witness (SegWit), a proposed code adjustment designed to free up block space by removing certain parts of the transaction.
For many people, Bitcoin Cash is the answer to all the problems of the original Bitcoin, continuing day after day to gain new followers.
Bitcoin Cash is a totally independent cryptocurrency, so its price does not derive from that of the original Bitcoin.