At this point, different things look plausible in different countries. Consider the possibility of a major banking technology provider offering it as a feature, in which case basically on day 1 you have 1000 banks that can choose to offer it if they believe their customers want to use Taler. Or you may have a smaller bank offer Taler as a limited experiment just to see if there is a business case, with very limited publicity. Or you may have a big bank offer it as a strategic product. Or you may have even a central bank beat everyone else and launch it as the official central bank digital currency. Personally, I'll probably sleep better if it starts small.