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.
I always do long term investment because i feel that i can earn more profit, and i think investing on very promising coin and holding it for long tern can be the greatest strategy to do specially when we will hold bitcoin for long term.