I think it's depending on your earning money purpose . Because if you earn money for living so you have to choose the short term investment and if you're not better choose the long-term investment for safety.
It depend on you because some people they want to take their profit after some time and some of them they want fast but there is one thing in long term if you will give more time to bitcoin so its price will go more high and it can give you big profit and I personally like short term because bitcoin is a digital currency and it here to change our life as it change my life through investment so join bitcoin and start investment here as much as you can.