My apologies for not making it clear. What I meant was that CMC should be used only for exchanging it to Tron while there is a separate currency for the shop so that you don’t have to spend your CMC that you want to exchange for Tron. Basically what I’m trying to say is you can either exchange CMC for Tron or you can exchange it for a separate shop currency. However if you were to exchange it into this separate shop currency, you cannot exchange it back into CMC (making it non-withdraw-able) once this exchange has been done.