You want to use it for the Money column in scoreboard, right? 
Use this then: 
exports [ "scoreboard" ]:addScoreboardColumn ( "Money", 3 ) -- Add the "Money" column to the scoreboard. 
      
    function updatePlayersMoney ( ) -- Create "updatePlayersMoney" function. 
        for index, player in ipairs ( getElementsByType "player" ) do -- Loop through all online players. 
            setElementData ( player, "Money", convertNumber(getPlayerMoney ( player )) ) -- Set "Money" element data to the player money. 
        end -- End our loop. 
    end -- End our function. 
    setTimer ( updatePlayersMoney, 2500, 0 ) -- Set a infinite 2.5 seconds timer to execute "updatePlayersMoney" function. 
 
Was that so hard?