It just feels like most times, it is good to just stick to few altcoins for long term and others for just short term, when I say short term I refer to Ethereum or Litecoin and when I say short term I refer to the whole lot in the crypto space. Now looking at a case scenario, XRP is facing a serious issue with SEC which no one knows what the outcome will be and on the other hand, many privacy coins are facing delisting from exchanges thus making their future somewhat uncertain. So to be sincere, if you want to consider holding for long term, then stick to Ethereum, at least to a great extent it has proven to be a decentralized and transparent platform. If you want to go for more, then take a look at Litecoin as well.