In the few halvings that I have seen or witnessed, most of the people who bought bitcoin buy it when the price of bitcoin is too expensive. This is the same type of person who rushes to buy bitcoin when it has taken off.
Yes, most people know to buy bitcoin on the dip, but in reality, that is not what most communities in this field do; only a small percentage of those who actually buy bitcoin do so. Even until now, for sure, 100k bitcoins will be bought by people who don't know anything about bitcoin. Right now, they will say Bitcoin, but when they see 100k per bitcoin, they will decide to buy it.
Nothing wrong with buying BTC at any price, especially if you do not have any BTC or you don't have enough, and also it helps if you have a 4-10 year or more investment time horizon and you are continuing to buy.
if you are merely trying to make a quick turn around, then you might get into trouble.. so part of the more important issue might be concerning how long the buyer is planning to stay into bitcoin rather than if his entrance point might have been higher than he could have had gotten.. especially since if someone is brand new to bitcoin, then the only way that they can prepare for up is by having some bitcoin, and if they do not have any then they are not prepared for up.
If you are suggesting to ONLY prepare for down by waiting, then it could be that the down possibilities are no longer available.. Do you know from here? Is this enough of a dip to buy or should the newbie to bitcoin or the low coiner wait for more dip?
Of course you are right nothing is wrong buying Bitcoin at any price because with how potential Bitcoin is and how far the price could go in the future people will realize that nothing is wrong buying Bitcoin at any price so long as they are ready to hold for long, actually is unfortunate that most people do not realize how potential Bitcoin is that's why most of them feels that the best way to start investing on Bitcoin is only when the price drop. However the only people who should consider buying on the dip should only be those investors that has already accumulated a huge amount of Bitcoin on there portfolio and only waiting for an opportunity for Bitcoin to drop so that they could Lump sum, but just like you said a beginner who has not gotten any amount of Bitcoin in there portfolio should not dwell on the Bitcoin price to fall before they could start investing because they are not use to the ways of Bitcoin and there could be chances of them missing out.