Coins per second doesn't work. Modifying it doesn't work. Can someone help me?

I'm trying to do a cash per second leaderstats for my new bedwars game in roblox, but whenever I modify the cash, it goes back to it's orginal state. If you didn't get that, here's what I mean.

game.Players.PlayerAdded:Connect(function(player)
	wait(5)
	while true do
		player.coinsfolder.Coins.Value = player.coinsfolder.Coins.Value + 3
		wait(3)
	end
end)

This is the cash per second code.

script.Parent.MouseButton1Click:connect(function()

 local price = 3 
 local player = game.Players.LocalPlayer
 local stats = player:WaitForChild("coinsfolder")
 
 if stats.Coins.Value >= price then
  stats.Coins.Value = stats.Coins.Value - price
player.blocksfolder.blocks.Value = player.blocksfolder.blocks.Value + 1
 end
end)

because it's a bedwars game, I need a shop. This is when you buy an amount of blocks from the store.

let's say that I have this many coins: https://gyazo.com/8613a8f0b953cbd0389fb643dbae4066

I buy the blocks, so I have this many coins now: https://gyazo.com/972ee6f1f7c1fb19d425f5fbc425beac

Then, it should be 16 coins, right? because 13 plus 3 is 16? the cash per minute adds 3 to my coins.

Instead, the cash per minute script instead ignores that the shop takes away 3, and it still thinks I have 16 coins instead of 13 that I have. So it jumps from 13 all the way to 19 instead. https://gyazo.com/2ea5acd141b295d1d82a1c7399022501 I think the problem is in the coins per second script. It will be a great help if you give me a hand. Thanks!