Central banks in every country always keep a certain level of financial reserves. In most cases, these reserves will consist of foreign fiat currencies, as well as precious metals, such as gold and silver. But the Central Bank of Barbados is looking at whether or not digital currencies should become a part of their reserve holdings portfolio. Due to the utility for international transactions, digital currencies lend themselves perfectly to become part of the portfolio of external assets.
https://news.bitcoin.com/central-bank-barbados-proposes-bitcoin-reserve-currency-basket/
