I think I can give some examples in your case. Maybe you can use some ethereum to trade to increase the ethereum you have. For instance, if you have 100 ethereum, you can use 10-25 ethereum to trade with altcoin, and you can find this on many exchanges. You can choose only a good altcoin that can give you a profit and to know this, and you need to analyze every coin in the ethereum pair. And once you find one or more, then you can try to buy and sell with you ethereum and I think you can get a profit and if you can do this in the down price now and you can increase the ethereum amount, I am sure that you can wait until the ethereum price back to the higher rate. But don't greedy to trade with the other altcoin because you cannot make any profit and you can get the loss. Besides that, you need have skills in trading so you can make a profit.