Yeah, if you are a great trader then you can make a lot of profit within hours, but you also can lose your money in split second, short term is certainly not for beginner because the risk is too big, for the beginner long term is more suitable because it doesn't need to complicated trading analysis and the risk is also not too big
Each trader has his own strong point in trading. I dont think that we can say for sure whether short, medium or long term traing are both easy to get benefit or not. Because all ways of trading can bring us profit, it definitely depends on every indivisual effort that one can reach many or few benefit. No one can deny that trading is a big risky, but if you wanna get income, youd better to find method for minimizing the risk. When you really focus on short term or long term, you will be definitely prone to one which is most suitable with you.