All funds, public or private, trust or otherwise, may be invested in any bonds or other obligations of a metropolitan housing authority, and such bonds or other obligations may be accepted as satisfactory security for all public deposits. This section authorizes the investment in bonds or other obligations of an authority of all sinking, insurance, retirement, compensation, pension, and trust funds, whether owned or controlled by private or public persons or officers, and funds owned by, or held on deposit in, any banking institution or building and loan association.