~snip~
Of course there are other ways.
"Buying the dip" and selling at the peak is one of the most popular strategy and one that tends to be more profitable that DCA.
You don't have to time the market perfectly, you're not doing day-trading here, all is required is to correctly identify where in the long-term trend we are. i.e. if we are down 70-80% from the ATH, then it's fair to say we're around the bottom and it would make sense to but more then instead of when the price brakes the new ATH and all the metrics show the market is overheated.
Or you could add some DCA elements to it, e.g. set regular purchases in the "consolidation period" only etc.
The way that the "dip" and "top" are defined change everything.
At any point in time where you have an All Time High value of Bitcoin, it means that all the tops before then when you sold you basically lost money and would have been better off to sell at the ATH.
Running at loss when you sell during the bull run when the price of bitcoin hasn't reached ATH does not mean that you are at loss because it is the price that you bought bitcoin that will determine if you are selling at loss. For instance someone that bought bitcoin at 17k+ and sells when bitcoin price is at 90k did not run at loss even if bitcoin ATH is 120k.
However, it will be better for one to hodli his bitcoin and continue increasing it overtime because bitcoin price will hit above 200k in future and that is why selling early when you see little profits will lead to regrets in the latter.