Ofcourse HODLing is so much profitble but you have to book profit at right time.

As crypto market is very much volatile so thats why you need to book your profit at right time, and if you thinking that which time will be the right book profit? Then it will totally depend on your buying value, your hodling period and how you expect after HODLing.
For an example from past:-
As we all know bitcoin was came down to $6K after touching its ATH $20K in last December, but if you go back to September 2017 that time bitcoin price was aroun $4K, imagine you were buy a piece of bitcoin in last Sept. 2017 and start HODLing and if you are HODLing it till now then you will get only $2K profit instead of $16k( if you  sell bitcoin at the time of ATH).

So my point is HODLing in very much profitable but also you have to know when to book profit. And you can simply do that by researching and learning about crypto field.