No one knows the "bottom" anyway. Someone will always buy at a point where it is low enough for them but a few days later the price can go down again and that person might regret buying even though the price them bought at was already quite low. There will always be a lower bottom because bitcoin is volatile and almost close to being unpredictable. So I agree that there is no fixed perfect entry point. It always differs person to person. The rule should be is once it is low enough for you then you should buy already.
Some beginners may be too hesitant to enter because of the fear of price drops. Of course, it can all happen because they are inexperienced. But if beginners who really want to find more information first, then they will be facilitated by their initial knowledge in managing their investment assets.
Some people will not think about the low prices to enter. When they have money and want to buy, then they can do it. It can all happen because of the belief that future prices will give them profit.