I don't know if I am cursed or something. If I sell a coin now from airdrop/bounty few days later that coins increases much that you will regret selling. If I hold a coin from airdrop/bounty again that coins price decreases much that you will regret not selling right away. I'm confused now whenever I sell the price increases and when I hold the price decreases. Am I cursed? 
No, and almost every crypto traders/users I know felt that before. You need to learn to analyze the market, which requires experience and the right tools. Also, you need patience, if the coin you are holding has a great utility and management, then hold it, have more patience. Earning a great money from holding or trading needs more knowledge about the movement of the market than pure luck.