An new investor or someone who is still accumulating bitcoin shouldn't think of selling when the price is high because he hasn't reached his bitcoin target an don't have more than enough Bitcoin in his possession, so that he doesn't destroy what he has started building for the future.
I think we should buy and sell based on our goals instead of buying and selling based on price. Whatever the price, if there is a goal to buy, then I am willing to buy at any price. In long-term investment, price fluctuations do not affect much. If you can buy at a low price, you may get a little more profit. But if you wait for the price to fall, you will delay reaching the goal or you will not be able to reach the goal at the specified time. Waiting for the price is a waste of time. Even in the case of selling, do not pay attention to the price and remain steadfast to your goal. Your goal in investing should be to achieve the goal. If you sell your investment in the greed of profit when the price increases slightly, then you are a failed investor. Finally, prioritize your goal, learn to ignore the price.