If you're planning to stop panic selling then there first thing you should do is to forget how to panic. Don't panic mate and you won't come up to a very disappointing decision. Even if the value goes down, your bitcoin count will be the same and when the market goes up you'll be happy again, now if you will sell it at a very low price then you're throwing away your money. Read and learn how to analyze the market and you'll be doing just fine. Panic selling is for newbies, Tech Analysis and Researching is for pros.