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 am doing both short term and long term investment and i am making a good amount of money but i know to myself that long tern is still the best investment to do and we just need to invest our money on crypto like bitcoin and eth to be successful in long term.