Ripple the centralized coin and for this reason she won't be able to replace bitcoin. The bitcoin is popular decentralization and therefore it on the first place.
That's right, because bitcoin is the king of all coins, it is very difficult to compete especially in the ripple class, it would be very difficult, and in terms of price it is also very far from bitcoin.
Looking to the future, what could be better than a centralized coin? If you look at the market cap compared to BTC and XRP, then my opinion is that XP will quickly grow to$ 10 than bitcoin of up to$50,000