No one knows when the bottom will be in, thats why we DCA when the market value is very low, forget the FED and just buy from time to time, most projects, altcoins for example have lost 95% of their value compare to their ATH.. There is no point including the FED here.
Exactly, if someone actually knew when the bottom will happen then they will just concentrate all their efforts on identifying when this will happen and make a single purchase of bitcoin at that moment, but since we cannot do this then a compromise needs to be reached and performing a dollar cost averaging strategy is a good enough compromise, as we are buying bitcoin when its price is very far away from its ATH and reducing the price at which we bought our coins as well.