How can I fix coding my currency for a game ?

I had a huge problem with a coding with this

local player = game.Players.LocalPlayer

player.WaitForChild("Currency").Changed:connect(function(val) script.Parent.Currency.Text = val end)

script.Parent.Currency.Text = "$". .Player:WaitForChild("Currency").Value

In serverscriptservice put this it might help just let me know.

local Players = game:GetService("Players")
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	local cash = Instance.new("IntValue")
	cash.Name = "$"
	$.Value = 100
	$.Parent = leaderstats
end)