Since 2gether's "users will enjoy extra benefits according to the amount of 2GT tokens they hold, in exchange for the larger value that their holdings create for the overall 2gether community", what would encourage 2gether customers to put their tokens on sale in exchanges?

I think investors outside Europe in 2gether's community are really interested in buying 2GT at its low price, but if there isn't any incentive for holders to sell, how would a healthy 2GT market (and consequently the value increase) sustain outside the app?