Depends on their plans towards their accumulation since there are people intend to split their balance into half so that they can use it for hodling and the other half for DCA then I find it good strategy to use after all since a person doing that may have balance to use in future if good thing happened which I expect since there's huge potential for bitcoin to grow more also they can ride up the current short term happening with bitcoin because they also have balance to use intended for it.
That's why its important for a person to know their priorities or set goals towards their trades and accumulation so that they would know what they really like to happen on their investments. I know its hard for some people to figure out what they like but constant experience towards the market events will help them gain knowledge and possibly they can create their own plan that can possibly generate them some good results.
I don't quite get your point,DCA is a method for accumulation in order to achieve a lower average purchasing price as the name implies(dollar cost averaging) so by definition DCA is used for hodling,what you're promoting is trading
As an investor especially one implementing DCA strategy,your plan should be accumulating as much btc as you can with the funds that you've set aside for investment and not thinking about capitalizing on little gains and selling off a portion of your accumulated coins due to bullish price action overtime that will greatly harm your portfolio and accumulation potential and overall it is generally not a viable investment strategy