for now in 2018 I suggest you can invest and buy as many XRP coins as you can because I see this year there will be a good development from XRP maybe the price can go up again and can be very expensive so you should be able to prepare assets you are XRP.
I bought some XRP last year. and this year they drop 60% less. I bought each for 1$ and now that is 0.4$. so I am at lost at the moment. I don't think it'll increase very soon. so my investment is locked until it recovers. and if I sell it now. I'll be in 100% lose.