No, I never panic sell when the market is dropping, I have found many time, if the altcoins have dropped to the lowest price, it will take a long time to recover, I will hold it and sell when it reach my target price only.
you have good self-control. I myself when in a down position will definitely feel panic about the value of assets that I have. but I don't want to sell it with a loss, I still feel panic and worry about the assets that I have, but I will try to keep the assets that I have.
In order not to be nervous in the market due to the fact that something may fall , I think you need to invest not all the money in cryptocurrency and only part ! and then you will not panic and worry