Lots of drama continues to unfold as a lot of exchanges continue delisting tokens. I feel Bittrex reason might be because of a break in the rule or maybe it's not trading enough.
As for ripple (XRP) I think the coin will REKT as more big exchanges announce their delisting. even Binance has announced their intentions in delisting the coin.
RE: Crypto exchange Bittrex will delist three privacy coins, Monero, ZCash and Dash