It is hard to predict maybe there could be another dip close to less than 20k again. As you wait for such and such time it will only limit your profit gain. So what you should do at this mixed market stage is to DCA and see how it goes. But if you feel you want to invest everything at once I will say u should be reluctant because even this 27k price tag is still low enough to gain considering the current ATH. Should we get another ATH then you could be having 2.5x+ of your investments.