I almost try to keep investments for a 6 moths period at least, do you consider that not enough?
it depends on the situation and of course when it comes holding for long term you should have a target so that you know when to sell.
And for me it would be enough unless if bitcoin really skyrocketed like what happened last year. Imagine if you bought at 30k last year, because bitcoin achieved 2 consecutive ATH. So surely you will become profitable enough.