I don't agree with this point of view, there are a lot of reasons why Bitcoin fell after the approval of the ETF.
Approval could help regulate and stabilize the market more, but it is not true that it is no longer possible to make more profits like before. On the contrary, I expect that the coming days will witness a significant rise in Bitcoin, especially with the approach of halving. We have already begun to see the beginnings of this rise and we are waiting for more. in the coming days.
Volatility is still there now and there is more manipulation.
There aren't many reasons why Bitcoin fell after the spot ETF approval because Blackrock applied for the spot Bitcoin ETF event had a very positive impact on Bitcoin's price. Hype and positive expectations were so big that it pushed the price up to 45K USD and this was because people were betting on the possible approval outcome. If we follow logic, we should predict further price pump after the actual ETF approval event because it reached 45K not because it happened but because people were risking that outcome would be positive. Then out of nowhere, the price went down and there aren't many reasons why it went down at the moment when it should have gone insanely high. Someone even donated 1 million USD to Satoshi's Bitcoin address. There are many things that don't make sense after ETF approval.
Suppose, if bitcoin increases sharply right after the ETF is approved and many people will sell to take profits, who will buy those bitcoins at a high price? I don't think the big funds and market makers would be stupid enough to push bitcoin to $45k or $48k or more and buy them at high prices.
Why don't we think that funds and market makers knew in advance that the news of an ETF would be approved and that they quietly bought bitcoin in large quantities beforehand? And when the official news is released, it will be time for them to sell to take profits. They are also investors like us, they all want profits, they don't spend time praising bitcoin or flattering it if they can't profit from it.
So there is no reason for bitcoin to decline when the ETF is approved, simply because it is "buy the rumor, sell the news".