Slow rollover then gather pace through the plunge.
As for the bottom, gawd only nows, Maybe around Nov/Dec.
Can only take a couple of days at a time with TA theories/prognosis, but it looks typically topish atm.
Had a hard run up, lots of bulls very recently, lots of speculation, crypto theme is/was exhuberant, volatility arriving which is typical of tops, plus seasonality.
I posted a while back a thread "I bailed". I still hold some positions but have lightened up considerably and rarely buying these days.
But I think mrk will not go down easily.