No doubt that etherium is a perfect coin but here I would like to suggest you that we should not only think about particular coin but we should make our thinking to spread with multiple coin that can make us more stable to make earnings in this field because if we will go with the single coin then surely there are chances that if the single one Coin will get dump then the whole Money that we have will get down into dump , so it is much better to go with multiple coin Investment .
Here my current suggestion for you to buy coin is trn , eth , btc for long term hodl coin , right now these coin are at very low price so better to buy today .

I think, that by the end of the year the price of ETH will exactly exceed 1k USD. If 2x is a profitable investment for you, you can try. If it is not enough, it is necessary to look narrowly at other altcoins which potentially can give the biggest profit.

Now do not buy the etherium. the market is now standing still and it is not known at what time and in what direction it will start moving. You can buy now an etherium for $ 580 and it will be expensive. And in a week he will probably return to the $ 400 mark.

I'll start buying the Etherium when it drops below $ 500. I think it will happen in the near future. And after that, there will be a flight to the moon.

Currently, Ethereum is a very undervalued coin. I bought in @ 300 falls of last year, and I've traded it for altcoins (pairing), and in the course of a few months, I tripled my original ETH stack of investment. This is the perfect time to take advantage of ETH's low price!

almost all Altcoins and Bitcoin are declining and it's perfect for an investment.

because Bitcoin is much in the interest of other people and investors to establish ICO.

so I always hold Ethereum for my future.

now the market is fall again,i think this is a last chance to buy with cheap price?i can't perdict about market but i beleive the market will grow up again in the end 2018 and 2019,now eth is 575,i thinh eth and crypto market will recovery soon

Then keep Ethereum's price on the Cryptocurrency market.
Because the value of Ethereum prices can go up and down quickly.
If there is a chance Ethics prices go down then you can buy it.
Ethereum is a potentially good coin if you have Ethereum.
The value is always up from year to year and the value is very stable.
So there's no reason not to buy Ethereum.

Well for me I already bought ETH now since its price is dropping, you'll never know maybe tomorrow or the next week the price will increase or it might also decrease. You'll never know when is the perfect time to buy, just buy it whenever it goes down. I still believe that ETH price will increase on the end of the year. So it's better to buy and hold on your ETH.