Here is a link https://medium.com/@galiabenartzi/bernard-lietaer-a-financial-justice-warrior-who-fought-for-freedom-of-currency-25123ca599dd
The article is really interesting. But just a warning, it is not just a 2 minutes read.
To understand, read, reread, think, rethink, repeate.
It gives an idea about many uses of cryptocurrencies, they can exist with fiat currencies not replace it.
Understanding it will put crypto on another level.
It is not about a currency replacing the others.
Any inputs highly appreciated.