Rank system went wrong, won't change rank?

So, I made the following script, the output did not give any errors, but when my cash value is changed, it does not change my billboard gui nor destroys it...

game.Players.PlayerAdded:Connect(function(plr)
	local cash = plr:WaitForChild("leaderstats").Cash
	local s = game:GetService("ServerStorage")
	local rank = s.Ranks
	local char = plr.Character or workspace.ChildAdded:Wait()
	if plr:WaitForChild("leaderstats").Cash.Value >= rank.Noob.Requirement.Value then
		local noob = rank.Noob:Clone()
		noob.Parent = char.Head
		cash.Changed:Connect(function()
			wait()
			if cash.Value >= rank.Fine.Requirement.Value then
				local fine = rank.Fine:Clone()
				fine.Parent = char.Head
				noob:Destroy()
				cash.Changed:Connect(function()
					wait()
					if cash.Value >= rank.Good.Requirement.Value then
						local good = rank.Good:Clone()
						good.Parent = char.Head
						cash.Changed:Connect(function()
							fine:Destroy()
							wait()
							if cash.Value >= rank.Pro.Value then
								local pro = rank.Pro:Clone()
								pro.Parent = char.Head
								good:Destroy()
							end
						end)
					end
				end) 
			end
		end)
	end
end)

so it should look something like this (I had to add some stuff to it to test if it works so just ignore them)

game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Connect(function(char)
	local l = Instance.new("Folder",plr)
	l.Name = "leaderstats"
	local cash1 = Instance.new("IntValue",l)
	cash1.Name = "Cash"
    local cash = plr:WaitForChild("leaderstats").Cash
    local s = game:GetService("ServerStorage")
    local rank = s.Ranks
    local char = plr.Character
     cash.Changed:Connect(function()
    if plr:FindFirstChild("leaderstats").Cash.Value >= 100 then
        local noob = rank.Noob:Clone()
        noob.Parent = char.Head
            if cash.Value >= 200 then
                local fine = rank.Fine:Clone()
                fine.Parent = char.Head
                noob:Destroy()
                    if cash.Value >= 300 then
                        local good = rank.Good:Clone()
                        good.Parent = char.Head
                            fine:Destroy()
                            if cash.Value >= 400 then
                                local pro = rank.Pro:Clone()
                                pro.Parent = char.Head
                                good:Destroy()
end
end
end
end
end)
end)
end)