Coinbase is posed to allow for BCH withdrawals sometime in late 2017 or early 2018. Given they will only be allowing customers to withdraw their BCH (Bitcoin Cash) many users are interested in having their BCH converted to Bitcoin, Ethereum or Litecoin.
Due to the large amount of Coinbase users planning on liquidating their BCH as soon as it is available, I expect a drop in the BCH value once Coinbase enables withdrawals. The sooner you convert your BCH, the better!
You can get started using one of these conversion links. I will be writting a quick walkthrough below on the process step by step.