It does! Every time Microstrategy buys bitcoin, bitcoin gets dumped though the reversal should be the case. I don't get why bitcoin price drops when Saylor announces BTC purchase LOL.
I can not stop laughing when I read your post

Well, I guess this isn't something we should be happy at. They are trying to get the big piece of the cake; isn't it going to make him influence the BTC price significantly? I guess yes, that's what going to happen in the near future.
Sounds like Michale Saylor usually gives us signal of market falls or corrections. However, I don't know why big guys like Saylor and Microstrategy chose to buy Bitcoin at peaks like newbies. If they want to accumulate Bitcoin, they can do it more aggressively when it was about $16,000 few months ago.
Below are three latest purchasing times of MicroStrategy. It takes them three months from 24 December 2022 to 27 March 2023 to buy more bitcoins. They did miss three good months to buy Bitcoin from January to March.
12/24/2022 810 $13.65M 132,500 $4.027B
03/27/2023 6,455 $150.00M 138,955 $4.140B
04/05/2023 1,045 $29.30M 140,000 $4.170B
MicroStrategy statistics