For long term investment, I am clearly focusing on the fundamental part of an altcoin, like uses of this altcoin, could it be helpful in the future? Could it be a problem solver? And also the transparency of their project.
We all know that most of the altcoins there are risky to invest in especially those new altcoins and got low trading volume.

If midterm, I am considering the technical analysis side and trading volume as well. If you analyze on chart and you think something will happen in the midterm, you can consider it, as the risk:reward ratio if you want to do it for midterm investment, you can consider it.
And also fundamental analysis here is also important for midterm.