Yeah I think you're right. But then the same thing will happen, even if they get public traction, cryptos will be legitimized and they will be traced back to weapons dealing, and all kinds of shady deals that big banks are already associated with all the time.
Only this time it won't be hidden, it would be exposed and I suspect many boycotting movements would start.. Not to mention that these are people who cannot engage in a win-win deal if their life depended on it.
They will try to screw the public and I suspect many people would run away to the other choices they now have and which they didn't even know before.
But who knows right? Just a thought.
I hope people will! What I find always sad to see is how many people around me don't even care about those things and would probably just stick with the most convenient currency.
Let's just hope that by the time the governments and banks embed their own blockchain tech, crypto is already to big to be manipulated.