If you want to long term investment and interested in altcoin, i suggest you to buy ethereum because the eth will have bright future as a cryptocurrency and someday the price of eth can beat bitcoin. Nowadays, there are so many people buy and invest in eth, so the demand of eth always increase and because of that i am sure that the price will increase too. For few days ago, it is the best time to buy eth because the price so worst and reach $260. But begin 2 days ago the condition of market better and the price of coins raise too, include eth. Today in coinmarketcap the price of eth reach $300 and i optimist it will increase again.