So let us wait for a maximum ATH of reality without thinking
you don't wait for maximum ATH because bitcoin growth is volatile and you never know the maximum ATH bitcoin keep changing from one ATH to another even 100year from now. You can only wait for the period of time you expect to sell your HODLing either 20 or 30 years and above.
It's good that we see bitcoin price pump and if you are waiting for a new ATH, don't also allow your portfolio to be waiting too, but rather be busy buying and accumulating more bitcoin through regular weekly DCA so that you can be increasing and growing your bitcoin portfolio for the future because, there will always be a new ATH in every four years during the bull run, since bitcoin is still growing and will get more matured in future.
Bitcoin is at 72k+ does not mean that it is too expensive to continue buying as a new investor because a time will come when this price will be called very cheap. Keep your bitcoin accumulation game ongoing.