Each month we put a lower target for ETH. Because we realize that ETH is very difficult to go up in 2018. May target 15000$ but now target 500$ for ETH at the end of the year. To reach 15,000$ then we need to wait 3-5 years if the crypto continues to grow or if the market continues to saturate, then we need to wait a lot longer
Indeed, not just eth, most altcoins are facing a difficult and challenging year, we need to choose goals that are simple and appropriate to market conditions and trends with eth, we should not be too illusions about the big milestones, that is not possible with the economic situation and community support. $15000 is not a reasonable number, you probably have hope with that in the next 3 or 5 years, even longer but for me, I did not have any hope, I just believe in data and figures taken from reality, and give real predictions instead of delusions.