That moment when you sell all your BCH for $4100 and then a minute later it hits $9000....so many conflicting emotions right now!
It's only in the gdax exchange, This to answer how the coinbase added bch api. But i think that the price will decrease a lot. It looks gdax still not open the bitcoin cash deposit from outside. So the hype of the bitcoin cash only in the gdax exchange site. and to sell your bitcoin cash in gdax should become the best thing right now.
An exchange that brings in most of the new money to Crypto! I'd say there is a lot of upside potential in the next few weeks.