Given the pattern of the Bitcoin market, the post-halving event will bring us a Bitcoin bull run that records its new ATH. After recording the cycles ATH, the Bitcoin market will enter a bear market. This is an indication that along this pattern profit can be repeatedly made.
With previous cycles, Bitcoin makes its new all time high and ATH or a new cycle many months before a halving day. In this market cycle, things are different because Bitcoin already made its new ATH that is a first time ever in its history. This makes people fearful that whether Bitcoin already completed its bull run and next months will be bearish.
I plan to sell any coins holding when the market is in a bull run, if possible, I will sell at near cycle's ATH price.
You never can identify the ATH and finding it is impossible and unrealistic so your are planning well by only want to sell near ATH.
Then after selling I will observe the market and wait for some months after it enters the bear market. Set a reasonable and realistic target buying price and start to DCA from there to re-enter the market.
By waiting some months, you are doing smart or selective DCA, not traditional DCA but it's good, not bad.
If you want to be too selective with entries for DCA especially when you start your DCA for a new cycle, you can wait more than 1 year after the ATH, to start purchasing. Bitcoin bear market often lasts for two years and by waiting one year after ATH to start buying, you will purchase around the bottom range.