I agree with you, ETH is just $155 now while it was able to reach more than $1,000 during the last bull run.
This coin has a huge trading volume, next to bitcoin so it's not a pump and dump coin, the reason it's here at this value is because of the long bear market, so if we will be seeing a consistent or long bull market, you know how the price would move.
It's quite disappointing to see prices go down the drain, after an exciting year of 2017. Ethereum used to be worth more than $1,000 per coin, but now it's worth way less than that. People who got in during 2017, have lost a lot of money. However, early adopters (like me) have largely benefited from ETH's latest bull run. With Bitcoin's depressing prices as of 2018, it's expected for the whole crypto market to become upset within a short time frame.
But one thing for sure, is that Ethereum is still the second biggest cryptocurrency by market cap with a lot of demand behind it. I believe that it will take some time before prices will rise again to their original levels. Knowing that this is not a get rich quick scheme, one needs to buy whenever prices are low and sell whenever they're high. In the current situation, prices are low which presents a great opportunity for those looking to expand their capital in the future.
Be aware though, that Ethereum is highly volatile in the same way Bitcoin is. This means that investments are risky leaving you with the possibility of either becoming rich or poor in no time. Hence, the best thing you can do is to buy a small portion of ETH while you keep the rest in stablecoins like Tether and DAI. Just my thoughts