Why when the player touches this it adds a coin to himself and the other players?

This is a leaderboard and the leaderboard in the leaderboard there is coins so I made a part when Touched it will give the player 1 coin but when he touches it, it gives him and the other players 1 coin I want to stop that help please!

player = script.Parent.Parent.Parent


script.Parent.Touched:connect(function()
	for _,Player in pairs (game.Players:GetPlayers()) do
		if Player:FindFirstChild("leaderstats") then
			Player.leaderstats.Coins.Value = Player.leaderstats.Coins.Value +1
		end
	end
	script.Parent:remove()
end)
	

The problem is that you're looping through all of game.Players children and checking and giving points to everyone. The following code will check to see if the brick is being touched by a player, and, if so, give points to him and him alone.

script.Parent.Touched:connect(function(hit)
	local plrHit = game.Players:GetPlayerByCharacter(hit.Parent)
	if plrHit and plrHit:FindFirstChild("leaderstats") then
		plrHit.leaderstats.Coins.Value = plrHit.leaderstats.Coins.Value + 1
	end
end)

This is a leaderboard and the leaderboard in the leaderboard there is coins so...

What? I don't really care about grammar but please use enough so we can understand you.

Anyways, your problem should be obvious. You're looping through all the players with a for loop, so of course it will affect all of them. Also what is your player variable? You never use it. It obviously cannot be a player, since this script has to be in a part to function at all. You also never have any check to make sure the part that hit the brick is actually a player, and not just some random part. Try something like this:

script.Parent.Touched:connect(function(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) then --Makes sure it's a real player
		local player = game.Players:GetPlayerFromCharacter(hit.Parent)
		if player:FindFirstChild("leaderstats") then
			player.leaderstats.Coins.Value = player.leaderstats.Coins.Value + 1
		end
		script.Parent:Destroy() --Remove() is deprecated, so use Destroy() instead. 
	end
end)