If bitcoin drops to $81k as philipma1957  predicts, it will not be the first time bitcoin has dropped to $81k this year, and it will not be a new thing to us if we see the price of bitcoin at $81k, so there's no best time to buy the dip because nobody can predict the lowest price bitcoin can drop to. If you are advising investors to buy the dip when bitcoin drops to $81k because you think that will be the lowest price bitcoin can drop to, you may be misleading them because bitcoin can drop below $81k. Trying to figure out the best time to buy the dip means that you have a target price you want bitcoin to drop to before you can buy the dip, and it can cause you not to buy the dip if bitcoin doesn't drop to that price. Any investor who is financially stable and interested in buying the dip should do it right away when a dip occurs without him or her waiting for bitcoin to dip more before he or she can utilize the opportunity.