As we all know XRP is not yet on coinbase however here is why I believe it will get there.
1, coinbase is a business, as such they want to make money. XRP IS a top 5 market cap with a solid project and there is very high demand.
2, XRP updated and posted there white pages. Is this needed for what ripple is doing? No. They meet with there customer's and show the project in person. Ripple is preparing for coinbase.
3, ripple price at the moment is at a very affordable rate where anyone can get more then just one XRP.
Now there is lots more but this was my name thought.
As for price predictions, I can see XRP being 5 USD if on coinbase. Now if the banks start using XRP and visa too, we could see this crypto mars shoot. Somthing like 100 bucks by end of 2018.
Now this is just my prediction and I'm no financial advisor. I don't know if XRP will be listed on coinbase but ask yourself this. Would you like to be on the side line when the do get listed or would you like to have your ticket to mars?
Comment below what your thoughts are too.