I don't think anyone will really know how much the Banks hot involved in Bitcoin.
It's like Money Laundering. The banks are the the biggest MLs in the world despite the Regulations they themselves have in place on their own customers.
My post was really only my opinion. I don't really know...
There were moved afoot to allow goods to be paid for by bitcoin. That would have made it a currency. Also NFTs were a spin off from Bitcoin, so it was on its way to becoming currency.
Here's what I have always thought about Crypto Currencies.
It was a hair brained scheme by some New York Banker who probably wanted to align every country in the World to use the US Dollar.
They knew that was a non starter and they would never be able to bring other countries around the world...