I can only feel it will cause volatility in the short term before the news and after the news, but in the long term we still have many other things to see about the possibility of all acceptance of bitcoin. The SEC may exert their power, but they are not the sole controllers and given the nature of bitcoin it is here to stay. I remember the "Tulip Syndrome" that was gradually forgotten when we had to be realistic that with bitcoin it was in a completely different state, and the comparison no longer applies much to that.
To be honest, I don't think that Bitcoin can even be compare to the Tulip Mania before. It was really a bubble and so just matter of time before it will blew up and bubble being burst.
This market's scale is still too small, those who come early always keep their opportunities and also take risks, but anyway, as someone who has absolute faith in bitcoin, I expect there will be more and more large organizations pay more attention to bitcoin.
I think it's big enough to accommodate institutional money and retail investors. And I don't think that someone can manipulate the price before or even the approval of Spot Bitcoin ETF. Investors are too much for that right now, we will call it when we see that there are entities from behind trying to control the market. And I do think that the market is going to mature once we see the first Bitcoin ETF approval regardless of who is is going to be.