I think ETH or XRP will replace BTC. but my prediction XRP will dominate the market more than ETH, I doubt to ETH after the vitalik left from ETH. on the other hand, XRP always develops its platform every time.
If viewed in terms of system control and values, they have a significant difference especially in terms of speed and transaction processes, while in terms of quality both of them are very feasible for us to rely on because ETH users are broader compared to XRP and XRP also fair skilled in playing its role in the financial sector. Although these two things are striking differences, they also have advantages and disadvantages that can benefit every ETH or XRP user.
how do you think, will the XRP replace BTC and has a very high value of $ 20K like BTC in 2017?
Most likely XRP had the opportunity to occupy that position, but its value could not beat the value of BTC far below $ 20K.