Ripple plummeted because it was everything the community didn't want a cryptocurrency to be. It's not decentralized, it's run by rich people and banks (just like FIAT currency) and it suffered as a result. Then the dip hit and it suffered even more.
I wouldn't even entertain the idea of investing in Ripple right now. If you're wanting to invest in an Altcoin during the dip, I'd be hitting up one of the ones with a strong plan, strong community, and strong interest. Right now, for me the front runners are NEO and VEN, closely followed by XLM and REQ.
NEO and VEN have higher interest at the moment, and they resisted the dip better than other coins. REQ and XLM are very solid projects imo, they just didn't hold as well due to lower interest in them.
Disclaimer: I'm invested in XLM, REQ, and VEN. I dont have NEO though.