I would not buy bitcoin now, because bitcoin is too high in my opinion.
If you already accumulated enough bitcoin (or more than enough), then you are in a position to wait.
If you have not accumulated enough bitcoin or more than enough bitcoin, then you might need to consider continuing to accumulate. Of course, since you have been registered on the forum since 2017, you may well be in a position in which you have accumulated enough or more than enough bitcoin. . That is surely for you to figure out.
Since he doesn't need Bitcoin, he has completely immersed/Saturated with himself in Bitcoin. Since he registered on the Bitcoin forum in 2017, he has been familiar with Bitcoin since before or since the price of Bitcoin rose from $1,200 in April to $14,000 in December 2017. If he had invested during that time, his Bitcoin would have increased hundreds of times, so there doesn't seem to be any need for him to invest in this high-profile market.
I guess that we could go back and look at Cryptmuster's forum posting history to try to figure out the extent to which he might have had been investing persistently, consistently, ongoingly and perhaps aggressively from mid-2017 to present, and/or whether he might have had front loaded his investment into bitcoin - yet for sure, I have my doubts whether we can make those kinds of assumptions regarding him or even regarding similarly situated forum members who had been registered on the forum for similar kinds of timelines.
The fact of the matter is that it can tend to take a decently long time for anyone to establish a decently good sized bitcoin position, even if they have the means to do so, and I have trouble making presumptions about what Cryptmuster might have had done - and perhaps it may not even be very relevant exactly what Cryptmuster did exactly as compared to his seemingly presumption that guys should wait for the dip rather than investing, and surely my own assertion has been that the more important factors related to either whether guys should invest in bitcoin or how they should go about it has more to do with how much they have already accumulated rather than trying to guess whether the BTC price is going to go up or down from here.
Sure, the specific focus of this thread has to do with questioning whether the BTC price is going up or down from here, which to me seems an almost impossible question to answer, except for our likely overall assessment of bitcoin still being in its early stages of adoption, so even if we might have difficulties figuring out short-term BTC price moves, it likely would still be the case that guys should be getting into bitcoin, especially if they are low coiner and/or no coiners rather than asking somewhat dumb questions about whether they might be too late to bitcoin - even though surely, many newbies (and perhaps even ill informed longer term bitcoiners) continue to ask the "am I too late" question.
However, those who have enough confidence in Bitcoin can invest because thinking about whether to do it today or tomorrow just wastes time and does not lead to investment. If you want to invest, it would be wise to invest without any hesitation and if you have sufficient planning and funds to invest.
I suppose that I don't really disagree with you since surely there would likely need to be some confidence to be able to have an investment timeline of 4-10 years or more, and even if someone starts to invest into bitcoin, most people end up having to invest over time, rather than being able to just lump sum invest (or front load) straight into bitcoin without any needs to spread out their entry point, perhaps over several years.