It's good to buy ethereum right now because it has dropped considerably from now on I think many traders are buying and holding on bitcoin and ethereum.
I agree with you, if you are holding an ETH right now better if you just hold it and wait until the price goes up again or the market increase again. Another option for you to earn more profit is to bu ETH or bitcoin because of the low prices now and just hold it until the value goes up again then sell it, by that strategy you will earn more profit and you will avoid losses like the others are feeling right now.
There is no doubt that the ethereum holding will make us get big profits someday, the more devs. which develops ethereum is certainly a good indication that ethereum usage will continue to increase.