if SEC approves Spot BTC ETF, will Trillions of dollars flow into Bitcoin?

So far we have only Bitcoin Future ETFs and Bitcoin Short ETFs. Which I think is not that much attractive to investors as it's a kind of gamble and therefore we didn't see that much money flowing into it.

There's no surprise that SEC has rejected a Spot Bitcoin ETF many times with one just a few days ago for I don't know what reasons but approved Futures and Short ETF.

One major drawback is there's no self custody but I think there are millions of people around the world who don't care about self custody and just wanna buy Bitcoin hassle free that's just simple Spot price and no futures and short.

With that being said what if SEC approves Bitcoin Spot ETF, will there be trillions of money coming into Bitcoin?