Price depends on ask versus demand. If there are 1 million oranges, but only 1 is being sold, price can sky rocket even still. Multiplying price with total existing oranges would not be a good representation of the value of oranges in that case though.. Marketcap and total supply are just a number, that doesn't say much when looked at without context.
Thanks. I'll remember to pass that information onto my University Economics professor. I'll bet he hasn't heard of supply vs demand before. What you're suggesting would imply Stellar having majority market shall. I could give you the numbers if you like?