They didn't "realized the potential of Bitcoin", They realized the money they could make
The banks aren't really interested in Bitcoin, nor its technology.
As painful as it may sound (I realise this may apply only to some of us), unfortunately, you're right. Banks won't really do something for the good that it can bring to people, but only get involved when they can profit. T
his is exactly what this German bank has done, and I'm afraid many more will start doing the same. They will use the 'BTC' buzz word and 'crypto' to attract the common people and get them involved in their tricky game.