I still don’t get how this could be interpreted as a “deeply concerned about someone selling $250k”, when the answer is “no I don’t think 100x that size would succeed”. From this I see one guy (C Z) who’s probably concerned about a supposedly systemic action with unclear goals, and another one (blue) fooling around a specific transaction.
I mean they could be deeply concerned as a person about whatever they projected about it, but it’s technically impossible with $250k which they admit right away. The way it was stated in the comment above is editorial, to say the least.
Looking through the chat, it doesn't seem to me that CZ is suspecting SBF with just this $250k trade. To me it looks like he is suspecting that SBF is doing something shady, and the $250k trade is just a tiny example of that activity. You have to intrepret this quite strongly to have the view that CZ seriously would think 250k would move the market. Additionally, CZ was right that SBF is a crook.
But judge for yourself, here's what SBF has entered into the Congressional record:
https://imageio.forbes.com/specials-images/imageserve/63981b...
https://imageio.forbes.com/specials-images/imageserve/63981b...