everything can happen if there is a desire, at this time many companies have joined the crypto world, so I think the bank will also issue their own cryptocurrency. Now that technology has developed so fast as crypto currencies, I am very confident that the bank will someday also issue their own cryptocurrency.
That is true and it will happen soon. Banks abd governments will eventually join the fray in the creating own cryptocurrencies and tokens to service their people. Some governments aren't really inclined to accept cryptocurrencies like bitcoin because they hade their own plans to create or develop their coins and they don't want a possible competitor when they start to issue their own coin to their people. Ripple is lucky to be adopted by some banks but other banks might also issue their tokens in the future.