Altcoins are doing so well in the market now even with the highs and lows. So if you're interested in investing in an altcoin, i would advice you buy either Ethereum or Litecoin. Ethereum because it the undisputed king of altcoins and the coin has proven its worth in previous times. You could also decide to look up other altcoins with extremely lower prices like Ripple and Tron, because this coins still have their prices at low amounts and if you invest in it, you will be gaining so much when their prices go up.