Trying to catch and sell off a token at the all time high (ATH) is basically the most difficult trading decision because no ones knows when it will come through and that's why everyone will tell you to set a profit target before entering into a trade and when you successfully set your personal target, you'll definitely sell profitably
Only a trader who has a crystal ball can set such a task to sell at the highs and buy at the low. Everyone else should be content with what the market currently gives them. If you have completed the task set for you, then you should get satisfaction from the transaction, regardless of where the price goes next.