i will choose ethereum for a long term investment because ethereum have big supported by many people and community and although the price is not in high price but soon the price will be increase especially if bitcoin is at a stable price. beside ethereum, i will choose litecoin as my long term investment, litecoin is another coin that will give a lot of profit in future so i think if we only have this two coin beside bitcoin, it is enough for us to sell at the higher price.