Do you have a target price at which you will sell if the ETH rises? You might use a limit order to sell the ETH at a higher price, and then wait to see if you get a fill. But there’s another way you could consider. Using options, you can receive money today for your willingness to sell your ETH at a higher price.
If the ETH price remains unchanged, you keep your ETH and the premium you received from selling the call. If the ETH price declines, and the loss is greater than the premium you received, you keep your ETH as well as the premium.