Maybe the risk they are looking for is the volatility aspects of Bitcoin, but people into long term plus executing DCA could really ignore those situations. Because people aims for long term on Bitcoin doesn't really look at the prices since every situation is good opportunity to accumulate whether the market pumps or at the dip.
Although I understand with people saying that they should buy more Bitcoin at that time, but they also need to know that this is not the only option they could do. Since whatever instances comes in the market people can continue to accumulate.
What I like about DCA strategy is it lower down the risk to lose from volatile market.
No need to look at the volatility because it is already part of the market, remember that our goal is long-term so don't care if it goes up or down, keep buying by DCA then that's what we need to do.
Some investors still doubt when the price of bitcoin rises because they buy bitcoin with small sats but for me it is not a concern because the important thing here is to buy consistently.
If there is more money in the form of dollars, it will be put into BTC even more aggressive efforts, while the price is still below $100K it is still low and will continue to do it to buy by DCA.