It is obvious that you need to sell and then re buy back when it goes down, it always happen in this scenario that the price crashes later and goes down, it allways happen.
Nope, I will not panic to sell my altcoins automatically, and will still observe if it is going to increase much higher than that and if not i will set it immediately. Most crypto traders usually sell their altcoins if the price goes up tp 100% but mine is different. I used to sell BITG when it get profit x9 and the next day I got the result x27