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 think short term investment is like every investor in every day to grow an investment, and long term investment can take a long time to grow or grow an investment but it is definitely a success in investing in another currency .