Why crypto ETF? Why not crypto?

Hi fellow redditors.

Long time lurker, but still kind of a newbie.

With the news that Grayscale has won it´s case againts SEC and might in the near future release crypto ETF´s such as Bitcoin or Ethereum ETF´s.

I have a question that I haven´t found the answer to, maybe someone can help or we can start a small debate.

For me the very very small fish in the ocean why are crypto ETF´s any good?

Why not just buy the cripto outright?

Is it the more fees from expected more trading due to ETF adoption?

Is it taxes?

Some other reason?