You are on point, but how about after a beginner has followed your suggestion for two years and then decides to sell at a very good price in order to buy the dip?. I think the beginner should be able to buy more this time around as their DCA must have accumulated a lot over those two years. What I mean is that this DCA approach is very good, especially for beginners, assuming it is done for two years. After the two years, the person can then sell at a very good price, combine all the saved up money with what they get from the sale, and then rebuy the dip. This strategy should work fine, but the only constraint might be the timing of when to sell high and when to buy the dip.
Definitely it's a wrong investment approach you don't sell your bitcoin to buy back when it's dip. That is the work of the discretionary income, I know to you it sound smart but I must tell you in bitcoin Investment for a long period of time has its principles that is used to achieve that target. That is why it is often repeated in this thread to always have a discretion or reserved and floats to be able to buy bitcoin when it's dip and also maintain a weekly regular DCA without getting tired. though sometimes your weekly DCA may varies due to your level of discretion and you may decide to increase or decrease when your source of income also changes. Now let me ask you what if you sell all your bitcoin HODLing after 2 years as you said, and wait for bitcoin to dip to your expectations and it didn't? Because I know some folks some years ago have also fell victim of such, by sell their HODLing and expecting btc to fall and it didn't fall emediately rather it increase to a greater high before diping a little. Let me just say during the early part of January 2023, btc was around $20k+ most investors was waiting patiently for it to dip more before buying, but to there greater supprise it surpassed the normal price from there it has grown massively an they lost the opportunity of buying around $20k. So the summary of everything is that we must not procrastinate or sell our HODLing to rebuy, as the opportunity of getting bitcoin at that same price may not Be possible anymore. Though bitcoin price is volatile in the sense that it may even fall below the price you expect to buy and also may not be possible to fall to what you expect, so do t sell bitcoin to buy back.