Which do you prefer?

Hello Everyone, want to ask few questions here.
Short term or Long term investment?
Which is more profitable to you?
What coins do think that is good for long term now?
Feel free to comment your ideas and opinions.
Hello! In 2017 and the beginning of 2018, it was possible to invest in long-term. In a falling market it is difficult to trade. In long-term, I invest in such coins as Fusion, Wavees, Quarkkane, Phantom. But everyone decides for himself.