IMO, it could impact Bitcoin in a positive way, imagine, delisting XRP which have a huge market cap, and what might happen is that, most of the hodlers of XRP will probably sell their XRP to Bitcoin and the market cap of Bitcoin will increase further. There's still a possibility that some holders will cashout their funds. On the other hand, I have read a news concerning XRP, it states that XRP will burn a portion of its supply and I think that will be good as lowering the supply will increase its demand and price. If people know this, they might go back and buy XRP again. Just a usual pump and dump that we can experience in XRP.