If you are selling a token that means you paid real money for it. Those offering to carry others are not the same ones selling tokens. They would be the ones buying the tokens with their gold. It isn't circular, at least not in a 1:1 manner. Gold is still gained through some effort or service in the game and not created by tokens. If no one is willing to buy/sell tokens then there will be no transaction.
The participation is the limit, not the sky.