Earlier quoted context omitted.
Is there a central bank that can print or sell Bitcoin to stabilize its price? Is there a central bank that can set rates for BTC credits and deposits? If not, in what way is BTC a fiat currency?
"Fiat" means it didn't exist until somebody said "this is money". https://en.wikipedia.org/wiki/Fiat_money
Also, coins eith a fixed possible supply, such as Bitcoin, act more like commodities than fiat money.