It depends purely on your situation as it's not the best time to sell bitcoin as we're waiting for a bull run to do that, but if it's an emergency you can sell it. Or else set the auto trade to sell off if the value falls and if the value pumps back, set the buy trade as well. For if the value is 7500 then put some of the coins you've got to sell and wait for the price to go down to buy back to the lower rates