I have often the experienced the same situation to you like just last week i sold my ADA when it hit the .05$ level after a day price move in an upward trend where now it goes to 0.063$ level though it really dis appointing I just keep movijg on and take it as a sad experienced 
You can learn from your experience, it never felt it was a regret that can make you panic when facing the market next. make your own target, and when you've exceeded your target, you should never get a sad experience.