Which is more crucial HODL or Short Trading ?
This depends on how you deal with your investment and your capability, both has risk but I find short trading more risky and gives me headaches and stress. In my experience I cant deal with short trading accordingly since I always missed the opportunity to sell, you need to be fast and often monitor the market to be able to timing the right opportunity to take profit.
Well both strategy are good however if you prefer to have no stress and you know that you are patient with your assets then better to hodl for long period and set a target price on when to sell. In that way you dont need to worry for the current price of the market and just monitor it once in a while to see if there's changes in price.