In fact, there isn't a completely standard answer, as everyone's situation is different. Simply put, what do you want to achieve with Bitcoin?

Some people just want to make a few thousand to improve their lives, and once they reach that target, they can sell.

Some people just want to buy a nice car, and when the price is right, you can naturally sell.

Some people want to buy a new house, and once that target is reached, you can sell. Some people need money urgently, so of course, they can sell at any time. Others just want to make some money, and when their target is reached, they naturally choose to sell.

Some people just treat it as savings, so they don't care about the price, and if the money is for investment and not urgently needed, they just hold onto it. Some people want to wait for Bitcoin to become mainstream currency, so they just wait.

The Bitcoin market is very free, without constraints, coming and going freely. When the amount of money you hold is magnified, it is often difficult to control your emotions of gain and loss.

Therefore, don't ask when you should sell Bitcoin. If you feel your target has been reached, you can sell.