Why are you looking for this coin? It doesn´t matter what supply do they have, if they have 1 million coins or 1 billion coins. You have to look at the price and market cap to evaluate if the project is under or overvalued.
chances are he wants to find a coin that has a low amount of inventory but has been circulating in the market and many enthusiasts, will later be able to get bigger profits.
basically a coin that has a low amount of inventory and many people are interested in having it will be able to rise in price higher, but all depends on the potential of the coin project. Having a limited amount of inventory when experiencing a price increase can be very high.