How could I make a money system in my game? [closed]

Here is a good script:

game.Players.PlayerAdded:connect(function(player)
    playerLeaderstats[player] = {}
    playerLeaderstats[player]["Money"] = 0
    local leaderstats = Instance.new("Model")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player
    local money = Instance.new("IntValue")
    money.Name = "Money"
    money.Value = playerLeaderstats[player]["Money"]
    money.Parent = leaderstats
end)

while wait(5) do 
    for _, player in pairs(game.Players:GetPlayers()) do
        --We don't use the IntValue's value because an exploiter can modify it.
        playerLeaderstats[player]["Money"] = playerLeaderstats[player]["Money"] + 1
        if player:FindFirstChild("leaderstats") then
           player.leaderstats.Money.Value = playerLeaderstats[player]["Money"]
        end
    end
end