Cryptocurrency are already use by some banks of the philippines as payment 
What's the banks name? AFAIK it's only blockchain technology but not crypto's.
so their possibility that many bank will follow soon depends on How BITCOIN introduced its function by the developher to introduce the advantages on having this kind of digital currency to their economy.
I doubt it that they will convey to crypto's, it's risky and they know about it although they can adopt blockchain technology.