Advance Help Needed! LocalScript breaks and stars acting as a sever script? HELP!

Okay, this is a problem I've been trying to fix for 2 days now, this is the only thing left to do and the game will be finished. I've been really frustrated these days and still am. I really need help.

I've been working on a car game for like a month now. and you can collect coins around the map. The coin script works like this - LocalScript Clones Coins from ReplicatedStorage Inside Workspace. When a player touches the coin he is given 10+ cash. But for some reason, after 2 minutes the script somehow breaks and when a player touches a coin everyone in the server gets 10+ cash and the coin disappears on everyone's client. Maybe there is a better way of adding the coins in the workspace?

LocalScriptInside StarterGui

local Coins = game.ReplicatedStorage:WaitForChild("Coins")
local clone = Coins:Clone()
local all = clone:GetChildren()
clone.Parent = workspace
local cash = script.Parent.Parent:WaitForChild("Cash")
local sound = script.Parent:WaitForChild("Coin")

for i, v in pairs(all) do
    if v.Name == "CoinGet" then
        v.Touched:Connect(function(hit)
             if hit.Parent:FindFirstChild("Humanoid") and 
              game.Players:GetPlayerFromCharacter(hit.Parent) ~= nil then
             cash.Value = cash.Value + 10
             sound:Play()
         v:Destroy()
         end
       end)
    end
end

The script works fine for the first 2 minutes, gives the player 10+ cash and destroys the collected coin. If you know how to help me please do. this is really frustrating and I want to get over with this. Maybe the script shouldn't be inside StartGui? Maybe the Coins shouldn't be cloned from ReplicatedStorage? Maybe the whole script is poorly written? Please Help.