I think Ripple is absolutely going to blow everyone away in 2018. It's got major banks on its network like Amex, National Bank of Abu Dhabi, Standard Chartered, Axis Bank, Yes Bank. Softbank is rumoured to have invested in Ripple. Its priced at ~$2.5 at the time of writing. I feel it can go anywhere beyond $10–$15 in 2018 and that may well be a safe bet. It has the potential to go way beyond that.
Of course I'd suggest you do your own research before investing but this was my own 2 cents on the topic.
P. S. I bought some Ripple at $0.25 sometime on 12th December 2017. Already on 10x returns. Ripple’s gonna make people rich. Do make sure you are one of those people