I totally disagree with you on that bolded part because it is Bitcoin we are talking about there is no time ideal than investing when you have your money readily available, there is nothing absolutely wrong buying even at the peak price, it is pretty much ideal to invest during the bull season and bear season, one thing we should always understand is that Bitcoin is best appreciated over a long term hence there is no point timing the market conditions before investing, secondly the market can be very uncertain which can make you miss good buying opportunities while waiting for an ideal time to invest.
You are correct that the best time to buy Bitcoin is when you can afford it. If you are adopting the DCA stractegy to accumulate, it is fine to buy at any given price. But if your option is Lump sum pattern, you will agree that the ideal time to buy is what the price have dropped significantly.
My response is targeted at people who see Bitcoin as a fast means to make money. There are many people whose intention is to buy Bitcoin now and sell it next year. My advice to them is that they wouldn't get the best deal now, maybe if they had invested two years ago, it would have been more profitable.
Yes the market is uncertain but based on historical pattern, there will always be a bull and bear season. Based on my assumption, it is possible that Bitcoin might drop below $70k within this coming cycle.
Acquiring decision is really situational since we cannot assume what's strategy has been used by other people. If for us we can do it anytime since nothing will happen with our investment especially if we are using DCA method.
But we cannot force other to use their strategy just like what you have said who use lumpsum method since buying at the dip is the ideal option to execute their orders.
If they are just doubting and doesn't apply anything then I guess this is the start of their wrong decision done. If they are also a trader it will be to bad for them to buy at the top since there's huge chance for their money to melt especially if there's sudden correction happen. So everything may vary depends on what people do.