Lol, I think there is enough BTC for everyone sell, or maybe there are average joe not willing to sell their BTC? I just think you make things complicated and over thinking, that just because ETF approved and people expecting the price to go up immediately and investors buying, not selling.
There are like millions and millions of bitcoin/crypto traders worldwide lmao idk how OP expect that there are no sellers. Like when you buy BTC, you're literally buying from a seller lol. Like there literally should be sellers for the market to work.