I think Gary is very wrong about this. Insiders typically have a very specific trading window for executing trades. The most common example is 22 full trading days after Earnings Release (more specifically, 20 days after ER+2). One example:
https://www.sec.gov/Archives/edgar/data/1164964/000101968715004168/globalfuture_8k-ex9904.htm
We also know that 10b5-1 plans generally will respect the insider trading window (see same link above).
We know Elon has stated intention to exercise and sell to cover a big block of options expiring next year, namely to mitigate from having to pay an extra surtax on those same options if he exercises them in 2022. We know that Elon has now publicly stated that he intends to sell 10% of his holdings to appease the woke mob (sorry for the politicization mods... but kinda true).
So triangulate... assuming Tesla follows the same vanilla Insider Trading Policy as other companies, any trades Elon intends to make before the end of this year must be completed by mid-late next week (Nov 17th if you count 20 days from ER, but I may be missing a day or two where markets were closed). That's not 4 weeks away, that's at most 5 trading sessions away.
I expect to see a steady climb of selling pressure next week as Elon finalizes all of his selling for the year.