The global currency system needs to be diversified with the adoption of liquid currencies to de-risk the system from dependence on a few reserve currencies, according to Reserve Bank of India Deputy Governor T Rabi Sankar. He also called for the wider adoption of central bank digital currencies (CBDCs) and warned against allowing private virtual currencies like Bitcoin to grow. The Indian central banker said the right infrastructure and liquidity are possible regardless of the currency involved and efficiency can be improved. India began its efforts to internationalise the rupee last year with 18 countries opening rupee accounts.