The DCA strategy assumes that the user does not have any prior knowledge about Bitcoin or trading, and therefore it is a long-term strategy based on the fact that the price of Bitcoin in the long-term trend is bullish, but once you gain some experience, you will realize that it is not the best strategy in terms of profits, but it is the easiest, so there is any improvement on it.
DCA saves our time and avoid headache to time the market.
This "smart DCA" thing is pretty much just once again trying to time the markets — whereas the point of DCA is to actually accept the fact that 99% of people can't time the markets, hence slowly buy daily/weekly/biweekly/monthly.
I can not disagree because the Smart DCA is somewhat against main purpose of DCA.
Although I do kind of smart DCA at some point, I think for most people it is better to do simple DCA and not eat the head.
When people try to do Smart DCA, they are trying to be smart and time the market. It is oppositely against DCA strategy.
Unless you understand the time when you need to get into the market, the smart DCA is not going to work for you. It's nothing but an indicator to get into the market based on price. That's why the majority of the people will get it wrong.
With Smart DCA, it has one more disadvantage, people will have to wait a long time to get in and it is big test for their patience. They can keep waiting for some days, weeks but if they lose patience at the top, buy at top, it's painful.