Yesterday XRP was 0.7 $ and now about 0.36 $, and 1 thing you should be aware is XRP devs HOLD most of coins in their hands, When you have most of the coins in the community you can easily Control the market, That how they play dirty game.
It seems that this is not a dirty game, they cannot fully control the market even though they have more tokens in their hands, this is purely due to the large number of market demands and there may be an impact with some news via twitter.