You make a good point. Total coin supply is one of the metrics I utilize to help me understand the potential upside in a token. However, I think there are several tokens where the total coin supply is misleading because most of that supply is not liquid on the market and the total supply is already capped so no new coins are being issued every day. Tokens that have a demand for their tokens outside of speculation have an advantage in this respect. With BAT the goal seems to be that purchases of the coin on the market be primarily from advertisers who need the token to reward users and pay publishers.