If I were you, now one bitcoin is more than 25k$, it's good to buy it now, then if it drops below its value again now, you'll buy too, as long as you apply the dca that others do, just save save until the right time of the bull run comes and then you decide if you want to sell it. You should have a timeframe of how many years you intend to hold bitcoin and then when you know that it is really profitable then think about whether you want to sell your holdings.