Holding coins long term is also risky especially if you don't know for sure what tokens you are holding, so actually holding coins short or long term doesn't matter as long as you know about the project and have done your research beforehand.
The average person who applies holding in the long term is the person who chooses popular coins or coins that are in good scope such as those in the top 10 in the cryptocurrency rankings, they do this in order to minimize risk and also to protect the value of their assets when there is a market correction, apart from seeking large profits.