Why when I die, the walkspeed does not save?

So I made a script saying if you have one coin, walkspeed is = 21

	local players = game.Players.LocalPlayer
	 
	script.Parent.MouseButton1Click:Connect(function(Click)
	    if players.leaderstats.Coins.Value >= 1 then
	        players.leaderstats.Coins.Value = players.leaderstats.Coins.Value - 1
	 
	        players.Character.Humanoid.WalkSpeed = 21
	    end
	end)

But it came to my attention that when you die, your walkspeed get reset. can you help me? (Keep in mind that I have more than one of these scripts, and each one costs more and makes you faster.)

game.Players.PlayerAdded:Connect(function(player)
	player.CharacterAddded:Connect(function(character)
		script.Parent.MouseButton1Click:Connect(function()
			if player.leaderstats.Coins.Value >= 1 then
				player.leaderstats.Coins.Value = player.leaderstats.Coins.Value - 1
				walkspeedbeforedeath = 21
				character.Humanoid.WalkSpeed = walkspeed
			end
		end)
	end)
end)

game.Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:WaitForChild("Humanoid"):Connect(function(character)
		character.Humanoid.WalkSpeed = walkspeedbeforedeath
	end)
end)

again, idk if this works, but it's pretty much what I can help. If it doesn't work, please be more specific as you can and try searching it on google.