Leaderboard stat failing to update GUI?

I'm trying to set up a GUI to take the value of a leaderboard stat but it's not working for some reason.

while true do
script.Parent.CreditValue.Text=player.leaderstats.Credits.Value
end
wait(1)

There are a few issues with this script, as well as a better method to using it, but I will tackle one thing at a time:

First, you have a wait() function outside of the loop. This should be moved to the inside, like this:

while true do
wait(1)
script.Parent.CreditValue.Text=player.leaderstats.Credits.Value
end

Second, something that is possibly an issue is that you are trying to put an IntValue / NumberValue into a String property. The best way to fix this issue is this:

while true do
wait(1)
script.Parent.CreditValue.Text=tostring(player.leaderstats.Credits.Value)
end

So that should fix your script, but you can take it a step further if you want to.

If you have ten players in a server, then you have ten loops running at the same time, which can easily slow down the server. To fix this, you can use the .Changed event:

function changeOccurred(Property) 
script.Parent.CreditValue.Text=tostring(player.leaderstats.Credits.Value)
end
player.leaderstats.Credits.Changed:connect(changeOccurred)

Now, whenever the player's cash changes, the GUI will update itself instantly. I hope this helped!