time line shows Buffett started accumulating cash after

Munger passed away unexpectedly.  He made a similarly dramatic move after his wife Susan passed away unexpectedly.   I believe he is preparing for the inevitable for himself.   The successor, Greg Abel, is a businessman, not a stock picker.   So Buffett is raising cash from his unbalanced portfolio, 50% as Apple, including paying capital gains tax now to transition to Greg.  It might not have that much to do with the market at all.

On a similar topic, traders here might want to develop a plan as well.   The worst can happen any day, and at that time your survivor would have no clue how to handle the trading positions you left, and time is sensitive for those positions.