You should do good research of the project, try to find one with good working product and low market cap. It can take some time but if you thinl on investing long term that may be a strategy for you.
Reading a lot helps doing right choices.
If you consider invsting short term, than take a close look at top ten coins, with bullish market than bring some profit.
Good luck
I agree that reading a lot helps to make the right choices. Your advice on long-term and short-term investment is very helpful. Thank you.