its depends on your style.. if youre an investor your strategy really is HODL for long term but if youre a trader ofcourse youll trade when you already have profit and just buy again at dip
This. For some people who arn't good at trading, holding is the best strategy. They lose money trading (not least on trading fees which add up over time).
The fee for each transaction is not much. But if one day people have thousands of transactions, then the transaction fee is a huge day. Your comments are very accurate.