Why do you think that it is a good time to buy now?
Based on the history, seems like the price of ripple has been signifincely increased at the last few days, it has been going up even against the bitcoin(and bitcoin went up against fiat by itself).

If the only reason you are interested in buying XRP now is because it recently went up, then you shouldn't do that.
You should be checking if there are any news about the coin the support it's uptrend.