This trading strategy in crypto sounds easy, but it's not that simple. Selling coins can be done when prices are high, that's an opportunity we can take to get a profit. And no one can really predict the bull market in the crypto market.
Well, you can also sell once you see barish signals. This is also a good approach.
Maybe for some it's simple but a beginner can't distinguish this and only his intuition can save him from this, neither losing or take profit.
I like how OP illustrate the graph however this movement is hard and rarely to be seen and sometimes can be confusing if it's the one we're waiting. And his graph is more suitable in mid to long term trading.