It's possible to do this, but it requires patience. If you can be patient enough to hold after buying for a long period until a new ATH is achieved, you can sell and wait for a long period again until a price correction occurs or a heavy crash or slash down in price occurs before you enter back into the market.

It's possible, but you can't always be perfect; in some cases, you might sell a bit too early or late, where the price will go up again, or buy too early and the price drops down more, but as long as you buy below what it sold earlier and sell above your purchasing price, then you are making a profit, and that's all that should matter.