And same like your friend there are so many like him who are aslo expecting the price to fall back at 24-26k before they actually buy because they feel and act greedy by thinking that if they buy it at the actually price now they would be at the loss but like you said no one knows how the price is going to be and hopefully the price might go down as they speculate but the chances of that happening is also two sided because the price rate can either continue to pump leaving you to either procrastinate more or buy at an even higher price. Sometimes most newbie who are eager to buy after acquiring little knowledge on bitcoin investment are the ones who are mostly victims to such actions.
I really don't think it should even be called greed. Perhaps I can say it's just a lack of good investment knowledge, just like you said that mostly unexperienced newbie Bitcoiners will more likely act in such a way.
Just imagine that, based on the experience I have had with Bitcoin since 2019 until now, I wouldn't really be agitated about when and when not to buy Bitcoin. If I bought Bitcoin at any price, I wouldn't really feel any regrets because I know how volatile the price can be, and I still know that even if it goes below $30k, it will definitely go above that too. That's why we have the DCA strategy, so if you feel the BTC price is so high, you can buy some fraction while waiting to see if the price can still drop a bit.