Answer: Yes, it is true that you never know how high the price of a pump can go, which is why it is important to set a profit limit and take it when that limit is reached. This way, you can ensure that you are making a good return on your investment without taking too much of a risk. Additionally, it is important to keep an eye on the market and be aware of any potential changes that could affect the price of the pump. By doing this, you can be prepared to act quickly and take advantage of any potential gains.