Bitcoin has max 21 million coins, this low amount gives it that fundamental value.
Can a altcoin with a billion max supply reach $100 each?
Has any alts in history with a billion or billion+ but no more than a trillion coins reach $100 each?
of course that can happen if demand for the coin is higher than supply, I take an example using coin X :
demand for coin X is higher than supply, because demand for coin X is 2 billion and supply for coin X is 1 billion, and that makes the price for buy order of coin X will continue to increase, so the price of coin X can increase very high.
therefore in my opinion, demand for coin is the most important thing to make the price can increase very high and max supply does not affect for the price can increase very high or not (reaching $100).