Fiat currencies ( £ $ € ect)

National currencies (Pounds ,Dollars ,Euros , Yen ,Rupees ect)

Whatever you choose to call them are haram because they are born from debt / riba

The only reason scholars of Islam have begrudgingly allowed their usage is due to 'Umum Al Balwa pic.twitter.com/0kAaSFeWlg

— Akbar Zab (@ZabAkbar) May 14, 2022