Self discipline is the ultimate trading skill that I have ever known! It is important to understand that trading all the time will lead to a serious mistake. There is no way you will make the right decision all the time, there are factors that are beyond your control. If your strategy works, you should take a break and enjoy your profit before you resume trading!
Trading all the time also underlines a serious problem; it's that you are not trading because you see an opportunity to earn but you are trading because you feel like you should trade. This is never a good sign for any trader because trading if you realize is the potential of making money where you feel something is simply overpriced or underpriced based on the future potential and price.
In trading, every time most of the traders lost their money just due to having more greed, it is the only thing , if we have some ability to stop it then only we can get success and go to the place where we can but controlling our greed is the main thing in trading, as you said you had make a huge profit but you want to earn more, which leads you to loss.
More greed and also quick panic. It's either you waited for too long to take profits or you panicked too early and cashed in loss/minimal profits, both of the are terrible feelings, And the third common mistake as we already discussed is the urge to trade all the time, without any real motivation or reason.
