"No. I really think that a currency should stay in the hands of countries. I'm not comfortable with the idea of a private group setting up a competing currency," Tim Cook said.
"A private company shouldn't be looking to gain power this way," Tim Cook added.
Facebook's attempt to drag cryptocurrencies into the mainstream has since met with regulatory and political scepticism globally, with France and Germany pledging to block Libra from operating in Europe.
Facebook's cryptocurrency move led analysts to speculate whether other large technology companies such as Apple, which has a range of financial services such as a credit card and phone-based payment system, would similarly launch digital currencies.
That speculation grew in September when an Apple executive told CNN Business that Apple was "watching" cryptocurrency.
Tim Cook appeared to put that notion to rest on Thursday.
"Currency, like defence, needs to stay in the hands of countries, that's the heart of their mission," Cook said.
"We elect our representatives to assume their governmental responsibilities. Companies aren't elected and should not be going in this direction."
© Thomson Reuters 2019