For me it is, knowing that their value is groeing but not a little bit faster than bitcoins àre but still they grow and their price was not a joke. They have the potential to be one step behind of bitcoins. And I know someday they will be like bitcoins who will grow that big kike almost 4000$ but we all know that when that happens bitcoins worth much expensive than ethereum as always. But if you are looking for a much cheaper investment and goes for a long time ethereum is a good one for you .