Leaderstats base.lua

local players = game:GetService("Players")

players.PlayerAdded:Connect(function(player)
	local leaderstatsFolder = Instance.new("Folder")
	leaderstatsFolder.Name = "leaderstats"
	leaderstatsFolder.Parent = player
	
	local cash = Instance.new("NumberValue")
	cash.Name = "Cash"
	cash.Parent = leaderstatsFolder
	cash.Value = 50
end)

response_AydenTurnerDVFD.lua

local players = game:GetService("Players")

players.PlayerAdded:Connect(function(player)
	while task.wait(5) do -- Delay for 5 seconds for each time money gets added
		local leaderstats = player:FindFirstChild("leaderstats")
		if leaderstats then -- Check if leaderstats is inside of the player
			local money = leaderstats:FindFirstChild("Cash")
			if money then -- "Checks if money exists"
				money.Value = money.Value + 1000 -- Add 1000 money
			else
				warn("Couldn't find the 'Cash' leaderstat, probably because your object name for money is different") -- Pops up if it can't find your money object
			end
		end
	end
end)

TESTING.lua

game:GetService("Players").YOURUSERNAME.leaderstats.Cash.Value = 50