The Turkish strongman also lashed out at interest rates, denounced them as a "tool of exploitation" which should be kept as low as possible.
The Turkish president, Recep Tayyip Erdoğan, has repeated a call on Turks to sell dollars and euros to support the national currency, which has been in freefall over concerns about the economy and deteriorating ties with the US.
The dispute between the two North Atlantic Treaty Organisation allies - which reached new intensity over the detention of an American pastor in Turkey - has hammered the lira and also raised questions over the future partnership between Washington and Ankara.
There are quite a few, a number of them addressed by Mr Erdogan in the New York Times.
The nominally independent central bank has defied pressure over the last few weeks to hike interest rates in the face of high inflation and a collapsing currency.
Addressing for the first time on Friday to a rally of his supporters, he said, "If they have dollars, we have our people, we have our right and we have Allah!"
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Erdogan said high foreign exchange rates were being used as a weapon against Turkey.
Against the USA dollar, the euro touched its lowest since July 2017 at $1.13715 (EUR=D3).
Turkey will "never accept the order, which declares war against the whole world", through the threats of sanctions, he said, referring to the U.S.
Ankara had already taken measures to respond and will continue doing so, he added. "Failure to reverse this trend of unilateralism and disrespect will require us to start looking for new friends and allies", Erdogan said.
Trump's announcement came shortly after President Erdogan called on Turks to help defend the country against the US-launched economic war against his nation.
Iran's Foreign Minister Mohammad Javad Zarif waded into the mounting row by accusing Washington of having an "addiction to sanctions and bullying".
President Trump's discarding of the Iran nuclear deal is a point of contention, as well, as almost half of Turkey's oil imports come from Iran, meaning new sanctions against Iran come back and hurt the Turkish economy as well.
Erdogan Friday held telephone talks with Russian President Vladimir Putin, discussing economic and trade issues as well as the Syria crisis.
Turkey has detained Mr Brunson for almost two years, accusing him of links to the outlawed Kurdistan Workers Party and the Gulenist movement, which Turkey blames for a failed coup in 2016.