Can I change the underlying fiat currency of my Monolith Visa® Debit Card? January 22, 2021 15:35 Updated No. The card uses either GBP (£) or EUR (€), and once you have selected your card currency, you are unable to change it. Related articles Can I pay in a different currency overseas from my Monolith Visa Debit Card? What currency do Monolith Visa® Debit Card refunds arrive in? Which countries are supported by Monolith? Who are Contis? What are my Monolith Visa® Debit Card limits?