Reportedly US Banks are going the treat Bitcoin (BTC), Ethereum (ETH), and all crypto purchases same as Cash. In the crypto economy, this move is going to be a milestone. 
I think you are referring to this article.
Bank of America could treat transactions with Bitcoin as cash
just add it in the OP so everyone will see, it's nice if you will put a link of information you shared so we can verify, and so you will not punished by violating the forum rules which is plagiarism.
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The OP's title is misleading as there is no ETH in the article although it is said that cryptocurrency in general is accepted.
It's in the article I shared, there you go.
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According to the letter, all transactions related to Bitcoin, Ethereum, Litecoin and other cryptocurrencies could be treated as “cash advance”.
Now with regards to the milestone thing, it will be a good thing for crypto as a whole but the chances of this to happen is relatively low and the article site isn't as reputable as other trusted sites out there so I don't believe that this will happen or should I say I'm not expecting for this to happen though.
I also think there's a little chance but if this particular bank will treat it that way, it doesn't mean the who banking industry in the world would follow.