It's a choice or will I say a strategy or what one is good at that drives how one goes.
Long term is good to you and most people because of most times, the capital invested, and the target.

Also, having short time trade is beneficial to some people also as the profit is derived instantly, and as such,
risk of loosing the capital in the long run is minimized.

so choosing a strategy is dependent on the person and the goal he or she wishes to derive and achieve at the end.