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.
So i guess as my opinion on bitcoin future will be stable and no coin will take over it.
so you needed a bank to start offering its service to another centralized service (ie. exchange) to make this conclusion?!!!
In every perspective i just see it in a possitive way sir.
With the bitcoin being accepted by the Bank and known person it really gives bitcoin fortitude.
With the person having a big name and accepting bitcoin . It will influence many people to buy bitcoin.