I'm holding my Ethereum right now and some other altcoins like Ripple and Tron. I also have Waves but I'm not sure about its future so I think I'm gonna sell it once the market recover. Being a long time holder is too hard and risky because I don't have anything to do when the market is down but to sell some coins that I want to get rid off and keep those promising coins. As long as the market didn't get worst, I will hold my investments maybe up to 5 years.