It's not gambling, you just made a common bad decision made by a new investors. My advice would be to think again how much could you afford to lose? If you think you already lose too much, holding is not a good option, you will only sell your ETH when the price go deeper because afraid that you would lose more, you wont make it till the price go up again, than it might be a good idea to sell some of your ETH and start diversifying your portfolio, buy 3 - 4 other coins. If you think you could afford to lose more, than you holding it will be better, because sooner or later the price will go up again, you just need to stop checking on your portfolio everyday.