Actually, I read some communicates in which Coinbase was explicitly against Ripple because of its difference with other real decentralized cryptocurrencies. So, if Coinbase decides to add cryptocurrencies, it probably won't be Ripple.

We should watch and hope to discover what they will add a little in advance, since that cryptocurrency will probably rise!

Please upvote my last post, too!
https://steemit.com/blockchain-crypto/@rosargia/blockchain-and-cryptocurrency-9-incentives-and-proof-of-work