I first heard this line eight years ago and so far this hasn't happened.
If you are unbanked, it's because you have little money, and you want to put it into something stable and something where you are protected - in other words, the exact opposite of cryptocurrencies.
> protection against hyperinflation,
In 2022, cryptocurrencies have experienced over 100% inflation. Your one bitcoin today will buy less than half the goods and services it would have half a year ago.
Cryptocurrencies are almost as old as the smartphone. You can't keep promising something useful and never delivering, forever.