What do you think is the next coin to be added to coinbase and why? I think its either Ripple or Monero. Ripple has great connects to banks, which coinbase likes and Monero is the most popular private coin out there.
Monero would never reach out to Coinbase to start listing it, so unless Coinbase somehow wants to hire their own developers good enough to maintain Monero wallets and their own infrastructure, you will never ever see a coin like Monero on there. Coinbase is all about trying to make money, and have the highest KYC available for any exchange. They will never want the difficulty of accounting for a crypto like Monero, with anonymous payments - and real Monero users with needs for anonymity will never verify at Coinbase!