I don't understand. If you are to DCA, then you don't speculate. To DCA is to buy Bitcoin in relatively small amounts in regular intervals, say, daily, weekly, every two weeks, bi-monthly, monthly, etc. as opposed to a lump sum purchase or an irregular buying pattern.
You are expected to speculate regardless of using DCA or not, also we need to get this clear that using DCA is just a way of knowing how to positioned for buying at the least market offer and not just buying in small amount, we can not perfectly know how to go about this if we are not using the chart flow in studying the moves on the chart through our perpectual speculations.
In DCA, you do the buying regardless of the price. So whether the price is rising or falling, it doesn't matter.
No, it's matters alot, when the market is rising or falling, you just don't buy and keep buying, that makes no difference from an ordinary investor who know nothing about what he's doing, you need to know that you can use any amount of money to buy but you have to have a specific target on that before buying after you might have gone through the charts and weekly candles to know if it's set well and favourable enough for a buy.