your title doesn't make any sense. bitcoin didn't join anything, it is as it has always been. it is the banks that are now slowly changing their stance because they have realized their FUD didn't go anywhere or do anything.
I think it's just a matter of semantics. But of course, the import of the OP is well understood. The crazy "bubble" theory against Bitcoin was everywhere in 2017 and that did scare a lot of noobs. I was a noob then too. Now we all know they were just fudding to keep their business afloat against their perceived threat from Bitcoin.
It's a case of other businesses wooing Bitcoin now as the most desired Bride.