I read the local news, and there is several articles that made me interesting, a few weeks ago, the mobile version of the Bitcoin wallet bitcoin platform decided to eliminate the conversion of bitcoin currencies with USD. then replaced with Satoshi.
the decision was taken to eliminate dependence on fiat currency. because bitcoin capability if converted to fiat, will interfere.
developer samourai wallet says "farewall fiat" or "goodbye fiat".
Even you have read several articles or there is a site that will not rely on fiat platform anymore then still it is impossible for the fiat to be obsolete just because of the crypto currencies. Just think that the whole world are depending on fiat currencies and that not all people know how to use Bitcoin therefore it is impossible for fiat to disappear of just like that.