Not only the newbies.
It is not right for everyone to invest in Bitcoin and chase after short-term gains when the best gain is through long-term holding. It is just like this thread topic, which is "Buy the DIP, and HODL". This is always the most profitable decision ever, and that's why people are advised to accumulate BTC directly proportional to their discretionary income, which will prevent the idea of depending on their BTC investment to meet their expenses.
Short term investment is just like trading, and you would most likely just temper with your portfolio and in the end of everything, I think you would end up not even finishing what you actually started but when the plan is long term with DCA strategy at most with a consistent view of what you doing through the DCA strategy then you would probably get to the finish line and realize the actual plan and goal of you investment in Bitcoin.
Short-term investment can be informed by trading and can also be a habit of not liking the idea of holding funds in stablecoin or fiat currency. Meanwhile, having a plan to hold for the long term does not mean the person will reach the finish line even when using DCA if the person is not mature enough with decision-making because it is easy to plan something, but fulfilling it is what matters.
We have seen some people who even invest in Bitcoin directly proportional to their discretionary income, but they end up selling along the line.