I think for many of us that started early pre-1999, have to accept the best of our portfolio has already moved on, (mostly sales) to think we can replace on a daily like-for-like basis is long gone. I personally couldn't imagine starting from scratch. There are far too many savvy operators out there these days, and have been since around 2010 onward.
If I was back-in I'd be tracking *distressed sellers rather than the drop markets. It would be very time consuming but I think there would be some great negotiated bargains to be had.
I'm using the word *distressed, purely as an operative term, those trying to keep up with renewals but with the occasional 'Blinding ' (or just worthwhile) domain in their portfolio or those just seeking sales more urgently than most. There are methods and matrix.
Domaining has always been a dog-eat-dog world, so nothing new, It just has the luxury of being at a keyboard distance, so nothing personal either