I'll try explain Basel 3The Bank for International Settlements is an international financial institution owned by central banks that "fosters international monetary and financial cooperation and serves as a bank for central banks".
First announced in 2017, the Basel III rules apply to banks operating in the US, the European Union and Switzerland since the end of June 2020. ... Under the new rules, banks are required to hold physical gold or other liquid assets for an amount equal to at least 85% of the value of unallocated gold on their books.Jul. 19, 2021