Let me rephrase my question again for better understanding: Which signals, what techniques, which movement do you consider while making selling decisions so that you always make best possible profit in the given scenario? If I chose right time to sell my futures, I would have made 10 times more profit.
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
You are right that purchasing and selling coins is straightforward to form a profit but it carries more risk if you cannot determine the worth of the currency you're more likely to lose. Therefore we've to figure consistent with the plan success isn't achieved without goals for this you've got to plan first then come to the proper conclusion.