to decide long-term or short-term investment depends on the capital and strategy of each. If you have capital and free, we can choose long-term investment. However, if we have small capital, we can choose short and medium term or do trading.
If we are good at trading, we can choose trading to get consistent profit. I think all investment methods are good
Often people’s vision is limited to only the positive outcomes of each decision in reference to investment, while every decision involves risk. Even with regards to this need, I think you can choose any that you want, though the choice should not be based on the size of capital. It also means, as already mentioned, that you also have to know your own abilities. It can be a trap to simply copy what others are doing that is all the rage, resulting to utilisation of one method. Trading as a business does appear fascinating but it does entail one to maintain a strong attitude and an even higher consistency. However the long term needs a lot of time and faith in the strategy that you have adopted. So it’s not the matter of which method is better, it is what you do with the method.