With headlines like this, it's always important to keep in mind that bitcoin is such a thinly traded (and largely artificial) market that actually trying to sell 8,000 Btc for real dollars/pounds would instantly and catastrophically crash the price.
Different dynamics. Buys require sellers, of which there are a fair amount (though few enough still that large purchases absolutely do shift the price significantly; we've seen multiple instances of Tether bringing the price up by 20% or more for the cost of billion newly minted USDT). Sells require buyers, which are in very short supply.
Now there's an introductory price for Bitcoin once it hit the stock market, and there's interest and reason for holders to not want it to go lower than that price. $55k thereabouts is when the ETF began.
Also, people are using Bitcoin like an index fund. They get paid, they invest. Every paycheck.
It's an odd thing to watch. I don't see another huge crash, but I don't see miracles, either. BTC has no use as a fast method of payment.
Store-of-value is all it has.