Short selling in bull run can be dangerous, but still when I see a resistance zone I can't stop myself from short selling! what yours opinion in this case? Should I continue short selling in this bull run, or should prevent myself from doing this?
Don't do that, never do a short trade or you'll regret it. I made that mistake years ago and it cost me a lot, some thousand dollars. How much can you profit with a short sell? Not much but also remember that exchanges have liquidity and liquidity asset investors, they manipulate the price of the coin by causing unexpected intense pump and dump to liquidate asset of future traders that open short positions or long positions with leverage.
Always remember that a coin's value can never go down more than 100% but the price of the coin can infinitely, 100%, 10000%, 1000000% and even more.