I dont think that now its a good idea to invest in Ethereum, since everything is falling and Bitcoin cannot get a stable price, constant races up and down. There is no doubt that the price of ethereum will grow, but I think it is worth waiting to buy a coin at the level of 150-180 dollars.
So what guarantee do you have that you will ever see such value again, I know they all depends on the increase of bitcoin temporary to grow pending the time their own bull run starts and they also fall along with bitcoin when it falls, but I doubt if bitcoin will fall that low for Ethereum to get such value.
The rise and fall of bitcoin is usually just the correction stage but I believe that bitcoin will be heading for $15k very soon, which means Ethereum too will shoot higher that the value you have seen for this year, and it will not also be long before Ethereum and other altcoins starts their own bull run when the altcoins season starts, so delay is quite dangerous, where Ethereum will be in the bull run in unimaginable, so it is better to just buy now even if the price declines a little bit later.