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).
Holding is a basic principle in order not to lose much of profits. Definitely, if you are not good at trading, you will just hold you coin and wait till the time for a bull market.
For the OP, They just said that bitcoin's popularity lessen time by time because a lot of people knew it already. In fact, those the people who had up in the statistics are those who are not aware in technology.