I think this is impossible unless the global economic crisis. But I don't think it can go beyond Bitcoin. Bitcoin is the number one coin.
Global economic crisis or whatsoever, XRP cannot top the list of the currencies and if what you guys are looking at is market cap, it is something that would be very hard for us to see actually. One thing with the XRP market is that it is a highly manipulated market since it is centralized anyway and a lot of investors really do not support it and I personally do not even see much future for it. So, I believe no matter how much the team wants to keep pushing it all the way up; this is one coin that always ends up getting R.I.Ppled badly in the long run.