Experienced people will never buy Bitcoin when the price is rising, they tend to wait for the price to drop and then buy and store it for a certain time to take big profits later. Therefore, in investing in Bitcoin, never FUD and FOMO and must be able to manage emotions so as not to get caught in big losses.
Are you in anyway trying to say that those who buys Bitcoin at any given price are not experienced people in Bitcoin?, if you are using DCA you shouldn't be worried about buying Bitcoin when the price is rising because if you cannot buy at any price means that you are not DCAing and secondly people that invest using DCA does not have the fear of missing out opportunities because they are always on there points of accumulation, so actually somebody who is very consistent will not be thinking about whether they are not accumulating the right amount of Bitcoin they should have been.
So those that normally have FOMO are those who have another objective of Bitcoin because already I can see that your motive on Bitcoin is not for long term holding because your investment advice is directly for quick profits making and I can tell you that the emotional management you are talking about will even get more worster if you choose to go for short term investment.
Another reason to potentially stop buying would be that the guy had already reached sufficiently high enough or perhaps over accumulated in terms of his BTC stash size.
One of the great things about persistent, consistent and ongoing buying of BTC is that it reinforces a guys conviction about his investment and puts him in preferable long-term-committed mindset, especially during BTC price dips.
I totally agree with you on this because you have just explained the point I was making on my previous post that is only when someone have more than what they have ever imagine to accumulate on Bitcoin will they be able to say that they want to stop accumulating. Secondly what you said is true about persistent because is through persistent accumulation someone will be able to develop the conviction of having another view and orientation about there Bitcoin investment because anybody who doesn't take there Bitcoin investment serious tend to have low conviction towards it.