I don't think that such an attack will be felt on Bitcoin. I mean, just look at Ripple's market cap, it's only 34 billion USD, while Bitcoin's is 1,250.38 billion USD, the difference is like heaven and earth. Moreover, the popularity of Bitcoin is much greater than that of Ripple, which the majority of people don't even know what it is or how it works. So there is no need to worry too much about this Ripple attack, because they are just embarrassing themselves with this action.